Quick Update:
I stayed at the same Marriott hotel this week and the iPad kept dropping signal again. I had no problems at home on my wifi except the death grip.
So I took it straight back to Sam's Club and exchanged the white 32 gb iPad 3 manufactured at the DM factory for a black 64 gb wifi only one manufactured at the DF factory. It was the only one left so I think I got lucky.
I am using the new one via the hotels wifi, and it's night and day. I used speednet and compared the iPhone 4, my net book, and this new iPad and the speeds are all comparable. The death grip issue is noticeably better but still there.
Overall, I'm happy. I did try out the google tablet and liked it but without a back camera, it was unacceptable.
My recommendation for those that keep getting wifi drops on the iPad 3 and not on the iPhone or other devices using the same wifi network would be just to exchange it and not waste any more time.
Ken