as some already said, Warren Miller has no affiliation with Warren Miller Entertainment. He gave the business to his son, who sold it to Time Warner,
As for his quote from that interview, he isn't dissing. I'd take it as he has respect for it. He says "it stretches the boundaries of ski ability." I would take that as, this newer style of skiing shows that there is more to skiing than just hauling ass and making turns, and Skiing's past has set up this future (just like everything else...wow). Old freestylers did what they wanted to do, which was passed through the generations to today.
So I would say that he's giving respect to "newschool", but no more than he respects racing, moguls, or dumby races.