"I can't really comment much about the rankings, guys," Saban said, "because I really do think the most accurate way to be able to rank any recruiting class would be three years down the road because I think the challenge for all these young men that got recruited today, wherever they're going, is to be able to stay focused on what they need to do to improve as players and do the things that they need to do to become very effective college football players, and it is a challenge to go from high school to college."
The Trojans added more high-end talent later Wednesday with the signing of John "Juju" Smith (Long Beach Poly, Calif.), the No. 24 overall recruit and the third-ranked athlete.
Jackson and Smith are the highest-ranked players to commit to USC under new coach Steve Sarkisian, who is attempting to revitalize the Trojans. Jackson, the third-ranked cornerback, also was considering Florida, LSU, UCLA and Oklahoma.
"Growing up as a little kid, my favorite player was Reggie Bush," Jackson said. "I just wanted to go out and live that dream and put SC back on top, back to the dominance of those days."
Smith was also courted by UCLA and Notre Dame, but said Wednesday, "USC's just been my dream school since Day 1."
"I just felt it was right to stay home and play football for the state of Louisiana and try to bring a national championship back to the state," Dupre said.
The reigning national champion Seminoles also landed one of the top unsigned recruits Wednesday morning in Ermon Lane (Homestead Senior, Fla.), the No. 22 overall recruit and the second-ranked wide receiver.
Solomon Thomas (Coppell, Texas), the No. 25 overall recruit and the No. 4-ranked defensive end, started off signing day by committing to Stanford. Thomas is the Cardinal's seventh ESPN 300 prospect in the Class of 2014.
Maryland also made a big splash Wednesday morning, landing offensive tackle Damian Prince (Bishop McNamara, Md.). The No. 26 overall recruit and the third-ranked tackle, Prince signed with the Terrapins over Florida.
The SEC entered the day with seven teams in the top 10 of RecruitingNation's class rankings.
Since the start of ESPN's recruiting rankings in 2006, the team with the top class averaged about 10 wins that same season, according to ESPN Stats & Information.
These teams saw the biggest jump in win total three years after signing the class; in fact, two of the top classes, Florida State in 2011 and Florida in 2006, won the BCS National Championship three years later.
ESPN.com's Greg Ostendorf contributed to this report.