If you are a snaker, and you wanted there to be snaking on Mario Kart Wii, then you may be displeased. Nintendo has ended the stunt. In Mario Kart Wii, they made it so that you cannot snake. The results of turbo boosting are settled by how long you hold a powerslide. However in previous games, it was how quickly you could move them from left to right. In my opinion, this is not considered cheating, but it does annoy players. Here is the British Official Nintendo mag's review:

The second big difference (in Mario Kart Wii compared to the rest of the series) is the removal of snaking. Ever since the N64 game, practically every Mario Kart game has included the ability to get a speed boost by waggling the controls left and right as you powerslide. This has finally been scrapped, and now your speed boost is determined by how long you can hold the slide.




Source: Mario Kart Wii: No Snaking For Mario Kart Wii