OK I think a lot of you are confusing weak wifi reception for "the death grip" - I've uploaded a youtube video demonstrating how my signal will go from perfect to almost nothing if you hold the ipad in landscape mode on the bottom left corner (with volume buttons on the bottom, home button on the left).
You can see the youtube video I uploaded here:
http://youtu.be/rB9nI-Fv2o0
This clearly demonstrates the ipad 3 design is very flawed, as it is only natural to hold the ipad on the bottom left corner with your hand when using it! This device is designed to be held, not rest on a table!!!
I apologize for my poor filming, it was done with an iphone 4S by me while also trying to demonstrate the problem, lol. I don't see how apple is going to fix this with firmware/software... iPad 3 is fundamentally broken...