the Jester said:
Yes.
As a side note, I also think 3e's advancement rate is obscene. Even using a variant system that gives rp awards of roughly 100 xp/character level per session and halving combat xp, it's very fast.
As you have things your XP rate breakedown will look like this:
100(level)/session - 1 level / 10 sessions.
1/2 combat XP - 1 level per 26.6 equal CR encounters.
It's really fairly easy to control this.
Figure out how many equal CR encounters you tend to have per session (in terms of XP rewards, note that one encounter 2 EL higher than the party level is woth two times the XP, and should be counted as two encounters, for instance). The hardest part of controling XP is finding this, since it can vary widly between sessions. Call this N
Figure how many sessions you want to play per level. Call this S
Now multiply your XP awarded from combat by the ratio 13.3(N)/S
Now for a RPing reward, figure out what % of XP you want to be from RPing. Convert this to a decimal (so 90% would be .9), and call this R.
Your adjusted combat XP ratio is now 14.3(N)(1-R)/S
Now for the accual RP reward, give the players the following XP every session: 1000(current level)R/S