Of the last 15 QBs to win a superbowl, 8 were 1st Rounders. 7 were not (although two were very high second rounders Brees/Favre)
If you just look at the last 15 Superbowls, 9 were won by QBs drafted in Rd1
Tom Brady really screws up the numbers. Unless you find the next Tom Brady, your chances of winning a superbowl are far greater with a 1st rd QB
Super Bowl 30. Troy Aikman (Larry Brown), Rd1
Super Bowl 31. Brett Favre (Desmond Howard), Rd 2
Super Bowl 32 John Elway (Terrell Davis), Rd1
Super Bowl 33. John Elway (MVP), Rd1
Super Bowl 34. Kurt Warner (MVP), UDFA
Super Bowl 35. Trent Dilfer (Ray Lewis), Rd1
Super Bowl 36. Tom Brady (MVP), Rd 6
Super Bowl 37. Brad Johnson (Dexter Jackson), Rd9
Super Bowl 38. Tom Brady (MVP), 3 Rd6
Super Bowl 39. Tom Brady (Deion Branch), RD6
Super Bowl 40. Ben Roethlisberger (Hines Ward), Rd1
Super Bowl 41. Peyton Manning (MVP), Rd1
Super Bowl 42. Eli Manning (MVP), Rd1
Super Bowl 43: Ben Roethlisberger Rd1
Super Bowl 44: Drew Brees (MVP), Rd 2
Super Bowl 45: Aaron Rogers (MVP), Rd1
Super Bowl 46: Eli Manning (MVP), Rd1
Super Bowl 47: Joe Flaco Rd1