Not true in my experience.

Don't believe the marketing hype this guy is obviously trying to sell you. Whilst I haven't gone out to consciously 'field test' this I have been out a couple of times on Valentines and generally noticed from observation that there are fewer girls out than normal. Not necessarily because girls in relationships are out with their boyfriends instead but because some girls just don't want to be out looking a bit sad and desperate on Valentines day. Particularly the hot ones.

If anything I've noticed more average/ugly girls out. Who are sad and desperate.

That said, that's only from my past experience. You guys might be knee deep in hot Vag next weekend.