Orton was never better than when he was working with McDaniels (Let's not haggle over a 0.3 difference in QB rating).
Kyle Orton Stats | Pro-Football-Reference.com
The Rams year was all about injuries. Tebow was drafted when the Broncos needed a QBOTF, and he was the right choice when you look at what was available. Given the alternatives, taking a gamble on being able to change his throwing motion was a sensible decision. He didn't work out, but look at the hot mess that was that QB draft.
1 1 1 1 Sam Bradford Rams Oklahoma
2 1 25 25 Tim Tebow Broncos Florida
3 2 16 48 Jimmy Clausen Panthers Notre Dame
4 3 21 85 Colt McCoy Browns Texas 5 4 24 122 Mike Kafka Eagles Northwestern
6 5 24 155 John Skelton Cardinals Fordham
7 5 37 168 Jonathan Crompton Chargers Tennessee
8 6 7 176 Rusty Smith Titans Florida Atlantic
9 6 12 181 Dan LeFevour Bears Central Michigan
10 6 30 199 Joe Webb Vikings Alabama-Birmingham
11 6 35 204 Tony Pike Panthers Cincinnati
12 7 2 209 Levi Brown Bills Troy
13 7 32 239 Sean Canfield Saints Oregon State
DraftHistory.com