agreed. i mean, you say the 1 in 4 thing, and some people interpret "unwanted sexual advance" as jump-from-an-alley stranger rape, and some of us think "oh, like when that creepy old Hungarian guy asked me if he could make my 'pap reek-a'", so you have this huge swath of people who feel the situation is a lot more terrible than it is and a huge swath of people who think it's no big deal at all.
i do think it would be useful to get an even remotely accurate statistic just to get people thinking about it, like BigFakeSmile said, sort of--for men to think that out of their twelve or fourteen female friends and relatives, it's likely one of them was somehow sexually molested; and for women to realise the danger (or, if it's a bit late for that, that they're not the only one).
but inaccurate statistics--1 in 4!--are often worse than no statistics at all. which sucks.