Doubtful.
The differences between the white and black iPhone 4 are cosmetic. The fact of the matter is that Apple is shipping white iPad 2s right now. Whatever technical difficulties Apple had in shipping the white handset have clearly not been a factor in the tablet's rollout.
No but the problem with the white iPhone (as far as I recall) was that light was coming in through the white back and hitting the camera from the sides. The iPad has no glass back so that problem is irrelevant.