White cars will not show defects nearly as much as a darker colored car will.
Now this doesn't mean it's going to be easier to clean - for instance, my fiancee's 03 Tiburon is white...the last time I detailed it, there was so much junk embedded in the paint that I spent about 2 hours going over the whole thing with a clay bar, getting all the contaminants out of the paint. However, after that was done, I simply waxed the car and called it a day. You couldn't get away with that on a black car - you'd still have all the swirls and fine scratches left to take care of.
I have also been wanting to try Meg's SFP...but nobody local carries it, and the one place I found it online must be out of stock - the item is listed, but there's no price for it or any "buy it now" option. Oh well.
Alex