short response: no.
long response:
when you have the #1 scoring offense, your defense will inherently have more opportunities to give up points because the opposing team will have more possessions. on the other extreme, if you are a low scoring team with high time of possession, your defense will have lower points allowed due to less opponent possessions. instead of looking at points allowed you should be looking at the differences between points & allowed points scored to get a better perspective on the overall performance of the team.
remember when everyone was talking about denver having the stingiest defense? their offense was a time of possession machine.. they grind the clock by pounding their notorious chop blocking running game up and down the
field. it takes a long time to score like that though, which is why both their PF and PA are low.
http://scores.espn.go.com/nfl/standings
SAN DIEGO = 14-2, 492 PF, 303 PA, differential
+189
NEW ENGLAND = 12-4, 385 PF, 237 PA, differential +148
NEW YORK JETS = 10-6, 316 PF, 295 PA, differential +21
CHICAGO = 13-3, 427 PF, 255 PA, differential + 172
DENVER = 9-7, 319 PF, 305 PA, differential + 14
just for kicks:
OAKLAND = 2-14, 168 PF, 332 PA, differential -164