Yeah this is what I have been saying for a while now. Both the Bengals and Bucs have had a really weak schedule so far and have really taken advantage. The Bengals may be more impressive because despite the really weak schedule they have outright dominated for the most part, while the Bucs have scraped by two wins against bad teams and had better showings against two other bad teams.
The funny part about the Bengals' and Bucs' schedules is that the teams they have beaten are either winless, or the teams they've beaten have one win against a winless or otherwise poor team. Minnesota's one win came against Chicago (one win, vs. Detroit). Detroit's lone victory came against Green Bay (winless), and Buffalo's sole victory came against the Houston Texans (winless). Green Bay is winless.
The collective record of Tampa Bay opponents through four weeks is 2-13. Discout Tampa's four victories from that record and it is still just 2-9 against non-Tampa opponents.
The same goes for Cincinnati's opponents. They beat Cleveland who has only beaten Green Bay (winless), Minnesota's sole victory came against Chicago (one win, vs. Detroit), Chicago's sole victory came against Detroit (one win, vs. Green Bay), Houston is winless. In other words Cincinnati's opponents are 2-12, and again if you discount the 4 Bengal victories that record is still just 2-8 vs. non-Bengal opponents.
Indianapolis, on the other hand, has beaten Baltimore (1-1 vs. non-Colts), Jacksonville (2-1 vs. non-Colts), Cleveland (1-1 vs. non-Colts), and Tennessee (1-2 vs. non-Colts). So their record with Colts victories included may be only 5-9, but they are 5-5 against non-Colt opponents.
In case you were wondering, Washington has beaten Dallas (2-1 vs. non-Skins), Chicago (1-1 vs. non-Skins), and Seattle (2-1 vs. non-Skins). Altogether their opponents are 5-6, which discounts to 5-3 vs teams other than the Redskins. I still don't believe in them as a serious contender, though.