For Tim Marchman's critique, click here.
For Joe Posnanski's take, click here.
If you read them carefully, I think you'll find they agree on a lot. The difference is one of attitude. Posnanski acknowledges that the numbers aren't perfect, but he's still willing to put more weight on them than Marchman will; Marchman knows the numbers are advancing closer to something resembling the truth, but isn't willing to drive his truck over their bridge.