If you look at the age demographic on the forum, you'll understand why a lot of the comments are based on rankings or "what is the most difficult".. the amount of 'seasoned artists' or even post-secondary music students who frequent this forum probably isn't as much as we'd think.
Also, it's just fun conversation. Sometimes it's fun to speculate on what constitutes difficulty and virtuoso technique. The problem though is that a lot of people end up posting shoddy recordings of the Revolutionary Etude thinking they are god

I find it's a mini right of passage when a piano student fully realizes that applying the technique and thinking of musical/artistic interpretation of a piece is more beneficial than seeking out the "omgz hardest piece ever". A lot of young students want to show off and play something fast, and a fast encore is awesome, and I guess it is easier to put into words the reaction from a fast piece than something more obscure like emotions drawn from a more intimate piece.
I dunno, it's late here and I wanted to chime in. I've been on this forum for nearly 10 years, and I was a really dumb grade 9 kid who wanted to play HR2 so I joined the forum haha. I've seen people come and go, and I find that the people obsessed with speed don't last on this forum too long. I would have never chosen to play some late Brahms or Bach by choice, but I did both this past year, and didn't have to worry about the stress of making them flashy; it was a new stress, but stimulated a more creative process to get a good sound and make the pieces engaging - something I never thought about years ago when I would be bashing through a piece way beyond my level.
Just for the laughs, I dug out my first post on this forum, and I have to say I'm a little embarrassed! The spelling mistakes make me cringe, and I'm 100% sure that I only mentioned the Beethoven because apparently it was his "hardest Sonata" haha!
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(from 2005)
MY FAV PIECES ARE
-Ravel Toccata from Tombeau de Couperin
go to
www.classicalmusicarchives.com to listen to it, it's so fast paced and awesome
-Liszt Campanella and Gnomenriegen
-Chopin Etude in C major, the hard one that covers the whole piano lol
-Schumann Estrella from Carnaval, easy and sounds awesome
-Beethoven Hammerklavier
-Once again Liszt, Frisak from Hungarian Rhapsody #2
-Again Liszt, Feux Follets, kinda wacky and near impossible
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So there you have it; compare that with any of the posts mentioning difficulty; I was 14 at the time, and I can probably name about 15 people on this forum who are likely around this age, just based on the content of their threads lol.