There seems to be an issue in pathfinder, when the party levels and gains power at almost an exponential rate. The power level raise from 3.5 has made it so non-power gamers can kill strong stuff a little sooner. After level 14 or so it's basically a crazy reality defying race to the end of a campaign (especially in high fantasy games). As a player in the last campaign, I really really enjoyed level 12 to 20. However, that time period was very short (3 months) in comparison to the painfully long (12 months) level 1-11 stage. My campaign is very young, so I know it's not a problem for now.
Is there any tricks to shorten the boring phase and increase the more fun level 12 to 20 time period that I can employ as GM?
I've attempted fiddling around with the experience chart but that caused much more problems than it solved. I've started my campaign at level 3 so people can have fun as level adjusted creatures within reason. We just got to level 4. I understand the whole "Turn into a strong hero through many trials" thing but it gets so boring as a GM sometimes.