My wife and I scheduled a stop in Portland this past labor day weekend just for a VAN's tour and test flight of the RV-12. (My wife ROCKS!)
Anyway... the little bird flies as advertised... wonderfully! Nice light, smooth controls with enough feedback that you aren't over-controlling. (well... after you realize it ISN'T a 172!) If I recall - we were at a mid-cruise... maybe 5200 RPM and 108 kts - and guessing about 100 lbs under gross. My recollection is a bit fuzzy... because instead of the calculated, test pilot, "factual" assessment I had planned... well, I was more like a giddy teenager at a new car lot!
It's no wonder Van's sells them so readily after a test flight. <snip>
In summary... as a 152/172 pilot... you'll find that the RV-12 is like a little sports coupe compared to a truck. To be honest with you... I haven't flown much this year at all. Getting some tail-dragger time in a Decathlon... and flying the RV-12 has really ruined it for me! I just don't really enjoy the 172 at all. And that is all that is available in my area.
Not bashing the Cessna... It's a good solid bird that has trained a lot of pilots. Just my own experience and feelings.
Anyway... search here on VAF and you'll probably find a few other test reports more professional then my ramblings.