Probably not with me on it, but an objective test found a 29er was faster than identical bikes with 27.5 or 26-inch wheels. So bigger is better, right? Nope. Bikes with 26-inch wheels came in second. Not what I would guess, especially with so many people pronouncing 26-inch wheels a dying beast.
This 10-minute video is for full-blown bike geeks, but it's very valuable intel if you're shopping for a new bike. Does that mean a 29er is best? Nope. There are lots of other factors to consider, but what I really appreciate about these videos is they cut through the marketing hype and objectively measure things, and they're also not trying to sell anything.
For the record, I own both a 29er and a 27.5-inch bike converted from its original 26-inch wheels, which makes it a Frankenbike. Would this test affect my decision on what bike to buy next? Probably not since I'm not a racer, but I still enjoyed watching how the bikes were tested, and how tests were able to counter some of the conventional wisdom out there.
You can see the first part that shows the testing protocols here.