As long as we're mentioning the Pats' home field(turf), could you (and/or either ctpatsfan77 or cstjohn, I forget whom) give a more-informed-than-I opinion on how well the Gillette surface is holding, esp. considering the unprecedented manner in which it was assembled: immed. after their loss to the jesters, with only a bye week & a road game before its debut.
(1)Personally, I have watched every home game the Patriots have played since they installed the field - or at least partial amounts of each game - and I have never noticed the field "react" any differently than any other field. However, I must admit I have never been specifically watching for a difference either.
(2)If there was something funny about the field, I am sure they would have replaced it over the off season. If it is something that became apparent after an injury this season, as suggested by a poster on page 1 of this thread, I am sure that the (A) NFL (B) Player Union (C) Patriots (D) Bill Belichick (E) FieldTurf who warranties the product would spare no expense in remediation before stepping on the field again. I remember a pre-season game was cancelled after the field was determined to be unsafe a few years ago - I think Baltimore was involved - not pats.. (I was also at the UVA v. Mich State basketball game that was cancelled because ice under the arenas floor was creating condensation on the surface of the court which is another sports example of safety concerns in team sports).
(3) I wasn't there when it was installed at Gillette nor do I know what contractor (gen. management), subcontractor (direct install), union reps (yep the carpet layers put in claims on this sh!t), inspection agency (3rd party testing, architect (product spec), landscape architect (gravel blend spec), civil engineer (drainage), Fieldturf (consulting engineer) contributed to the project.
(4) The short time frame in which the field was installed is not an issue in my opinion. There is no specification that requires any kind of duration (example: concrete take 28 days to get to 90% strength, paint takes 3 hours to dry). Engineering fill ( different sized rocks that come from different quarries and blended to optimize drainage and subgrade support) are put down in layers of 4-6 inches. This rock is engineered and testing includes "gradation" and "sieve analysis" among other things.
Each layer is compacted to a PSI or PSF specification and testing, reviewed and approved by any engineer with a stamp. After the carpet its layed out and nailed down, the rubber infill is added and spread around with a gold cart pulling a huge rake.
You would be amazed how many thousands of lbs of rubber infill is used but it is evenly distributed. Again, the testing agency does tests, usually a GMAX type (basically a impact sensitivity test) at random locations selected by the 3rd party to the tune of 1 test per 100 SF or equal. Anyhow, if the tests report the surface is "too hard", more infill is added until the tests pass. The test results "pass" based on the discretion of FIELD TURF and the architect and owner.
After a couple games on any new field, high spots (spots missed by the rake being pulled by the golf cart) are kicked around or what not. This is something you see at a public high school not a NFL stadium as I would assume the grounds keeper there are better qualified than a high school landscaper. If you have ever run around on a new field, you sometimes dont even notice -explanation: these field are super flat (1/4" in 10 ft or less pitch) and graded to beat that standard which blows away what a traditional grass field could ever achieve.
(5) Field Turf reviews all testing and writes a letter of conformance before the field is ever stepped on by a player. They also enforce specifications that must be followed at all times.
(6)All testing research is done by third parties and some links can be found here. In interest of full disclosure, the links are provided by the most visible manufacturer of turf fields. These test reports are put together by researchers and university professors, etc.
http://www.fieldturf.com/football/safety/