Yes, and my main point is "why bother?" The fastest way from FCPX to YouTube (for all us mere mortals) is:
1) Completely render the storyline (project should be one of the ProRes codecs) (it's actually faster to "pre-render" then export than have FCPX do both — might have something to do with how the processes are handled/queued in the background)
2) Export Using Current Settings (codec should be one of the ProRes')
3) Use Quicktime 7 Pro to transcode to a 5Mbps H.264 (or smaller if you know what you're doing — YouTube is going to do it anyway, and your Mac will do a better job.) QT7 is usually faster than Compressor (in my experience - I might just be biased).
4) Upload to YouTube using their Upload page.
As a reminder: FCPX can render H.264 at over 50Mbps -- more than 10 times what YouTube wants to see, and adds that much (10x) to the file size (many people have a 10 or 15 minute time liimit OR 2GB whichever is greater.) There is NO WAY to change the rendering "quality" options in FCPX. YouTube has 60 hours of video uploaded every minute of every day... FCPX is cholesterol to their system -- not only do they have to ingest 10 times the data, they have to spend the time to recompress it to their limits (I actually wouldn't be surprised to find out that YouTube was flat out cancelling fcpx uploads due to their size [I think I would actually say: "Good for them!"]). The only time it makes sense to go directly from FCPX to YouTube is you have a fast fiber connection, a full partnership with YouTube and produce video guaranteed to "go viral" — in other words: they want to get what you have.
Using the steps above, QT7Pro takes very much less time to transcode ProRes exports out of FCPX to H.264 (5Mbps, AAC, Fast Start, Optimized for Streaming) than going directly to H.264 from FCPX (from which you *cannot* alter the compression options anyway, OR Compressor (in which I always seem to get into trouble with *too many* options [I have *never* gotten better results than I can get with QT7Pro]); you're uploading 1/10th the data (so 1/10th the total time it takes to actually upload); YouTube leaves your video alone (it won't recompress what it doesn't have to); your video will look just as good (if not better than if YouTube "touches" it) and you don't have to put up with the FCPX export to YouTube (or Vimeo, or any of the others for that matter) hassle.
Using FCPX, you may get to play with the video gods? But: only the video gods get to play in video heaven.
Play nice. It gets you a whole lot further with YouTube. You have to be *invited* to be a partner.