I think it depends on your approach:
positive: Some people actualy search on SE's for "euro girls" or something similair, so that's good I think
negative: Maybe surfers who have seen lots of crappy "euro" sites might not be interested. Or they might associate it with the currency in Europe
Of course if the traffic you send to the converting and the non-converting page come from different sources, it might not even be the euro word causing the conversion difference. Or it might even be the link that leads them to it that makes a difference.
Hell, what do I know?! It might be anything
