Seriously? If a girl lied and said she was a virgin because she thought a guy would judge her for having sex with fifty guys, she isn't doing anything wrong? I guess you're just more... open to lies than I am. I hate lies. I could forgive somebody saying he was 6' tall instead of 5'10". I could forgive saying you're 150 pounds instead of 160. Sex? Sex is a big deal. If it wasn't, this thread wouldn't even exist.
I wouldn't care if some friend of mine did this. If a guy lied to his girlfriend about this, and I heard about it, I'd try to support his choice... but from the perspective of the girlfriend? No way. If somebody lied to me because he didn't want me to judge him, then he's already judged me- and found me lacking. That's insulting! He's decided I've got the maturity level of a boy in high school.
He obviously didn't know anything about me before he gave me his virginity, or he would have known that I actually respected his choice to remain a virgin. Maybe it wasn't a choice, but he doesn't have to say that, does he? I'd assume it, wouldn't ask any questions, and we could certainly run with that. The fact, though, that he thought I was the sort of person who would think poorly of him for being a virgin means that he didn't really know me when we had sex. I'd take this to mean that it didn't really matter to WHO he lost it to... and I honestly wouldn't want to be with somebody who was so careless about sex.
And mingled in with all of that would be the fact that he lied to me. Lied to me and thought that was acceptable behavior! If you're not mature enough to tell a woman that you're a virgin, I don't think you're mature enough for sex.