That's a fascinating, and very Machiavellian approach..
Yep, that's why a lot of the older contenders are thought to be amongst the frontrunners: Danneels (70), Kasper (70), Tettamanzi (69), Hummes (69). For that matter, Arinze at 71 falls into that category as well - but everything I've read leads me to conclude a conservative 'activist' Pope is not the likely choice.