my experience going back has been mainly riding at 6 mile, the sourlands, and chimney rock.
my observations thus far:
- i'm really outta shape. 29" or 26" wheels don't help that.
- i do notice a difference in acceleration, 26" wheels are quicker to spin up to speed when you need it (like when you are about to wedge yourself in an awful spot at the sourlands and its either pedal or fail). appropriate gearing could affect that.
- rock gardens at the sourlands are still damn hard no matter what the wheel size. i cleared the same spots i normally do, and had issues where i normally have issues.
- the twisties at 6 mile were just as much fun.
- rolling is different, but i have 2.35" freerideish tires, so i can't compare really.
- riding the blue trail out of boulderama at speed at the sourlands rules, 26 or 29.
- oh, and riding without clips is just damn fun. 5.10s made it more fun.
overall - happy with the switch back.