They might all be drafted in front of Gilyard, but that doesn't mean they will be better.
Benn could be very good, but against top teams, he had a very hard time getting separation.
Bryant seems like he could be great, too bad he is from Oklahoma State. OSU WRs are awful. I know you aren't supposed to compare people just because they are from the same school, but he just screams Woods to me.
Damian Williams will probably bust. He can tear apart PAC-10 defenses, but I'm not impressed.
Tate could be great, but his downside is his size. If he is put in as a 1 or 2 WR, he will fail. If he is played as a slot guy or even a third down back.
Lefell will probably be a bust, but will be drafted because of potential.