Rotoworld gave the Giants a C-, Jets the only team in the A range, thought it seems the grading curve was a bit strict.
Some clown on Yahoo gave the Giants a D- and the Jets a C-. There are some dumbasses out there. I think the consensus is that both team did quite well. I haven't seen any actual knocks on the Jets draft--most everyone seems to generally agree that the players picked were good values and good for the team. There's more variation in the Giants draft grades which boils down to whether or not people grade it based on what Barkley should be, or whether they think it was a mistake to pick him at two, plus the QB they drafted is somewhat controversial. If you're good with those two picks you give the Giants a good grade; if not, you give them a much lower grade.