This one is for Croom and others who say the Spread is a "fad"..
under West coast offense:
At the college level, LaVell Edwards and Dewey Warren created an offensive system similar to the West Coast Offense at Brigham Young University (BYU) in 1973[3] This offense culminated in a NCAA Division I-A national football championship for BYU in 1984 and a Heisman Trophy for Ty Detmer in 1990. BYU broke over 100 NCAA records for passing and total offense during Edwards' tenure. Several coaches and players associated with BYU's football program had success with this offense at BYU and elsewhere including: Mike Holmgren, Andy Reid, Brian Billick, Ted Tollner, Doug Scovil, Norm Chow, Jim McMahon, Steve Young, Ty Detmer, and Steve Sarkisian among others. The reason for the success in this version of the offense is that it cuts down on complexity. Norm Chow says offenses have around 12 basic pass plays and 5 basic run plays (with screens)--those plays are run from many formations, with plays tagged for a little versatility, so that the players know the offense by the second day of practice. Former Pittsburgh and Stanford head coach Walt Harris also used a variation of the West Coast Offense during his stint at Pittsburgh.
Since we're splitting hairs on the variations of the spread, I think it's fair that we can split hairs on variations of the West Coast offense. I know this talks about BYU, but this is what Sarkisian at USC runs, and now that Chow is at UCLA, is probably what they will run to. You are right they do run a vertical passing attack, and you are also right that this variation is different from Croom's. In my opinion, we should be running the Chow/BYU version becuase it has been proven successful at the collegiate level and it is significantly easier to learn. And as you said, the USC version is also much more aggressive in terms of attacking downfield.