22mph for 90min on a road bike is a pretty epic goal for a dude currently riding a hybrid. I'm not sure you understand it gets exponentially harder. Going from 17->20mph average over my typical test course took a year. 20->21 was another 8 months and 21->22mph was another year or so after that. 23mph average over my 40k course may never happen on my Roubaix, altho I do hit that on my dedicated TT bike.
Of course if you're talking about riding in a pack, then all bets are off. Shoot for 25mph at that point.
I ride the hybrid on campus or to the corner store sometimes, I ride the ancient road bike in the mornings at 5:45am after dropping my son off at swim. Normal route is mostly flat 20 miles Mon-Thurs 30 miles on friday and I have been trying to get 50 in on Sat. yet my wife always has other plans.