Hi Tom,
I believe the guys here have answered your question about as well as it can be.

Sure there are some guys that will not move up, even when "booted", but they are few and far between.
I believe that the beginner should shoot for Intermediate ASAP. Flying the whole pattern, and getting scored, was to me the immediate goal.
Intermediate is a place that you can dwell in for a while with no complaints from anyone, until you are consistently good enough to move up! You, and everyone else, will know when that is. IMHO, some are scared of the move to Advanced because they have gotten to be a pretty good intermediate flier, and the thought that opportunity for "mantle decorations" will go down is sure to enter the picture.
I think that Advanced is the toughest class to move out of. The step to Expert can be very large. Seemingly greater than any other advancement over the long haul.
I moved to Advanced after a long lay off because I didn't want to fly against my son! LOL!! I was probably ready to do that before the lay off, but it has sure been tough (as it should be) since we came back. Funny thing is, after 5 years, I am flying against the same core of guys as before. Only one guy has moved up. (and of course, we got Busby in the trade, hmmmmmm.... Hi Buzz

)
Let's fly, soon!
Bill <><