I wonder whether the guy's "legs in front of the crank" remark referred to that rule of thumb wherein a plumb line dropped from a certain point on the knee should bisect the pedal axle. If so, it's got to be a vast overgeneralization. I mean, it may be true for some WSD bikes that are set up in a certain way, but it's certainly not true of all of them. And whether it even matters depends to a large degree on your particular cycling needs and desires.
I agree with Sue's point, that this guy sounds like the type who think everyone should ride like he does and the ones who don't--well, they don't count. What an a$$! Avoid him like the plague.