It's the kind of image that has been prevalent in the gaming industry for eons. I wonder how disparate the percentages of female hackers (if you can define hacker sufficiently) versus women in gaming are. Certainly in gaming we're pretty much used to it by now - and it is slowly changing.
Plus, as another poster says, 'when in Taiwan'; their culture's totally different. If there is a gender imbalance specifically in Taiwanese or Asian computing (and most of the female CS students I met were from China or Japan), addressing it needs to take the culture into consideration - the miniskirted lapdancers are a symptom, not the disease.
This is true, and I'm not making a value judgement on this particular event at all. I'm just saying that a comment like that is projecting the poster's own morals, thoughts, and culture onto a whole separate group of people who probably don't even think like that at all.