LOL Well, one can hope. I haven't had any of the problems others are reporting. Even if you do, you'll get through it. I did the download just a bit ago, took around 30 minutes in all...no worries.
Did you get a prize for being the 1000th meraber?, cause I think you should!
Here's a screenshot of my phone before and after the OS 4.0.1 upgrade. Not much difference except I lost 1 bar and the bars are taller so it's easier to tell if you have 1 bar or less.