I typed this on the ipad last night.. It's supposed to say Mpix ad's for anyone wondering.
I get why they would make them white, to stand out, same reason alot of photographers get a battery grip on their d90, not because they need the extra juice but because it makes them feel cool.
I was watching a commercial or something a few weeks ago and they were shooting portrait with these massive lenses. Would you actually use them for that or is it just to make it look "in the commercial" like they are professionals?