I don't actually *feel* like Flash is op or anything, but I do very much believe none of the summoner spells should be picked so much more often than the others.
When is the last time you saw someone without flash? Never? Yea, me neither.
It should be happening though.
Smite is different because of it's jungle specific use, but beyond that all the summoner spells should be being used equally, and if they aren't than they need balance changes until they are.