yea that is def. not true...in my opinion
to be the best you have to kill it everywhere not just in one area, you have to be a well rounded rider not just a park rat, but im in no way saying tanner is the best rider...
and to answer the original question, last year he didnt ski park because of his ankles, pipe was more fluent and but less stress on his ankles, and this year he was focusing on big mt. lines more than park or pipe, I think he might be trying to leave competion and focus on big mt. and bigger picture