Okay, CFOP might not be the fastest method, but there is no evidence to suggest that it isn't. CFOP has by far the best results in competitions, I know that Roux doesn't have as many users so there is a very slight chance that it is indeed faster than CFOP.
I like CFOP the best because it is much better for cubes like 4x4 5x5 6x6 7x7, and even if other methods were a little faster I would still use CFOP because it is better for big cubes.
I don't want to try to convince people who are using a different method to switch to CFOP, but it does upset me when someone says they are going to try to learn CFOP and 3 people immediately say they should check out other methods. Because, most likely the person learning CFOP has thought about which method and decided on that.
Had to split it into three posts because of the character limit.
most people going straight from LBL are, but there are quite a few people around 15-30 seconds that use a hybrid method who most likely have thought about it more. My advice to any new cuber would be to learn CFOP after LBL until they average sub 30, and then try out other methods before making their final decision. If people have already made their decision we shouldn't try to change it.