I think this depends a little bit on how generous GMs are with the IRs and how characters use them. Is the PC trying to sprint towards Rune level immediately, or round out their character a bit, maybe trying to get that elusive extra CA (!)?
Also- is a game session the equivalent of 1 scenario? One stretch of time after which an IR is awarded?
I think some of those answers will make the poll more exact.
EDIT: I will also say this- if my PC's really wanted to get to Rune level- or it was important they get to Rune level to make a campaign work correctly- some stuff in my game might get fudged (ie.- A year and a half passes uneventfully and you have lots of time to train and learn. You have X amount of IRs, keep in mind, to fulfill your deities request you must at least meet these requirements - then lay out what's needed to reach Rune Level).
Some players enjoy the slow, hard earned character building, others just want to be powerful right off the bat. It's most important that everyone have fun.
Those are my disclaimers, I will vote on the poll after you hot me with those answers Deleraid. :wink: