I have typically defended Parcells, and I still think that many fans unfairly present themselves as being smarter than Parcells in making football decisions. Things generally aren't nearly as black and white as fans (and posters) tend to make them, and Parcells years of experience and success justify giving him the benefit of the doubt.
However, I have to admit that I am starting to think that Parcells can only take us so far - that he has us headed in the right direction but may not be able to finish the job. If nothing else the expectation that he wont be around next year, or certainly in 2008 anyway, may prevent that, but I'm not sure he has all the peices in place he thinks he does (or fans/posters seem to think), and I think he has to adjust a little to compensate.