I guess we do get a bit carried away sometimes (perhaps talk of dinosaurs and zoom function should cease - but it's so much fun!)
For me I think the difference is that Victoria Coren is just that - herself.
We are talking about someone who has played numerous characters who are in the public domain and for the most part, it is the characters we lust over discuss.
It is also not the only thing we talk about - Winner seems to have devoted himself entirely to VC's breasts for purely gratutious/offensive purposes for the best part of a week, which is a bit different from the kind of tongue-in-cheek comments that come up on here occasionally (ok, maybe a bit more often than occasionally
) alongside more worthy discussions and topics.
I also have to say (and yes I know I probably shouldn't and am being sexist but...) I'm inclined to think that a man is less likely to be mortally offended by a complimentary assessment of his assets (alongside his other considerable and more intellectual talents) than a woman is to be offended by a completely gratuitous barrage of Tweets solely focussing on her boobs.