Saban, Holtz, Stoops, and even douchebags like Chimp and Petrino turned pretty average programs into big winners fast ( Oregon won 10 games or something the year before but they had some 5-8 win years from 2002-2007). The talent is there. its not top five SEC SEC SEC talent, but it is top 20. There's always going to be some attrition, but there would be attrition regardless. He gets paid three and a half million dollars to change the culture and be effective relatively fast. The coaches mentioned all did it pretty fast.
He doesn't need to go at 12 and one and make the playoffs by next yr., but if they're 9-5 with a relatively easy schedule, then 7-6 again, then 8-5, that's just treading water. Luckily I see him doing better than that. There's not a magic winning percentage, or goal or bowl, other than the Rose Bowl IMO. It's improvement, beating Oregon, doing better than 5-4 yearly, taking back the Pacific Northwest which is rightfully UW'S and being in the top three or four in the conference on a consistent basis, & Yes Rose Bowl relatively quickly... been way too long....