For a large measure in this sue first, ask questions later mindset, its generally safer to not market items based upon objective criteria. Biggest, Fastest, Longest can be subject to interpretation, and suit which lets face it Disney is a deep pocket that would typically have to settle cases out of court for nuisance value.
As for the ride itself, we got to ride it 2 (and a couple of us 3 times) on Sunday and everyone thought it was an amazing ride. The experience itself will market the ride. Disney never has been a park looking for extremes. It seeks to market to the mass market/most people possible. Marketing like Highest Coaster, Fastest Coaster, Most inversions, are for parks like Six Flags, or Cedar Knowes that are looking for Roller Coaster enthusiasts. Thats why people go to those parks. Disney doesn't need to market for that crowd, but also likely doesn't want to. While some people want to ride the fastest or highest roller coaster, you will get multiple people who say "That ride is faster than X....I am not going on that." or "That ride is higher than Y, thats too high for the kids yet"