Clearly you weren't around for Steve Young's rookie season
are you speaking of his rookie year in the USFL?
Or, are you referring to his first year with the Bucs, in which he played in only 5 games?
BTW, RG3 already has more rushing attempts than Steve Young had in any one season in his entire career. The most rushes that Young had was 76 in 1992, his 8th year in the NFL. RG3 also has more yards rushing than any year that Steve Young played in the NFL, which was also 1992, Young's 8th year in the league. Steve Young and RG3 are absolutely nothing alike, in any way. RG3 is on pace to have 140 attempts his rookie year.
In fact, RG3 is running more than even Randall Cunningham. Cunningham ran a career high 118 times in 1990, his 6th season. Maybe RG3 is more like Michael Vick? Oh wait, the most attempts Vick ever had was 123 in 2006, his 6th season in the NFL.
RG3 is rushing the football at a higher pace than any QB in NFL history. And, he's doing it much earlier in his career than any QB in NFL history. He isn't going to last.