Welcome to the new and improved Proflex / K2 Tech Forum!
After watching the video, I don't see any particular bias. He's right about all his compliments about the Pro-Flex, and also right about all but one of his critiques, the exception being that the NR-4 rear shock has both rebound and compression damping adjusters.In stock form:The cockpit is too far forward for riding downhill (not "downhilling", but just riding downhill at all);The head-tube angle is very steep, which makes steering responsive going uphill and scary going downhill;The J-path of the Girvin fork is very unsettling in corners;The bike is heavy compared to newer bikes;The wooded terrain he rode on was too technical for the Pro-Flex, though the dirt road and singletrack was fine. It might not seem to make sense to compare the two bikes he compared, but it does make sense if you consider that they are both bikes *he* wanted.Yes, mountain biking is more focused on downhill performance nowadays. However, that doesn't mean everyone is riding ski lifts to get to the top, it just means people got sick of buying bikes that could get them to the top of the hill and then were scary as @#$% to ride back down -- which is supposed to be the fast, exciting, and easy part of the ride. My 756 was terrifying to ride downhill until I got a telescoping fork with more travel, shortened the seatpost, moved the seat back, installed disc brakes, and generally made it more capable of surviving the reclamation of all the energy I invested into riding uphill in the first place. And yet my Christini *still* handles descents better.