Yeah, it's hard after the first week. Because of NFL parity, you never know which wins are impressive or not.
Cincy was supposed to be a playoff team that improved, but who knows?
Same for Baltimore vs. the Jets. I mean, the Jets pretty much had everything go their way last year and were 9-6. Defense was superb, and their rookie qb was adequate; what more could they want? Now, who's to say that qb will be any good? who's to say that defense was going to play as good as it did last year or regress to the mean? So it's hard to say if that was an impressive win by the Ravens over a tough Jets team or if the Jets offense is really THAT bad (since Baltimore was supposedly weak defensively this year except that they still carry the same rep due to the jerseys and the name of ray lewis).
Did the Saints beat a tough rival? Or did they eke out a win at home over a team with an injured 42-yr old qb missing its best receiving play makers?
Who knows, time will tell.