I haven’t been using Final Cut Pro X on a huge project (yet, check back with me late next year) but I follow a lot of people who are and they universally comment that Final Cut Pro X is “200 to 400% faster” for them. As near as I can tell these people are doing the same sort of work on Final Cut Pro X as they were on Final Cut Pro 7 and finding that they get to a result from twice as fast to four times as fast. Twice as fast to four times as fast!
Even if it’s not there yet, the design intention and production reality seem destined to make Final Cut Pro X’s market share increase, even among the pros. (They won’t like it, but twice as fast can’t be ignored, let alone “four times faster”.)