"Furthermore, the majority of the folks I've known who were drawn to Rand were not from my comfortable professional managerial class, they were strivers, up-and-coming folks seeking to escape lower income and lower status positions."
The only Randian I've ever known came from a very wealthy family. He married and bred with another Randian whom he met at a randian convention.
But this is not saying that your "striver" profile doesn't make sense.
I suppose the only way one would know is to go to one of their conventions.
http://www.aynrand.org/site/PageServer?pagename=index
Joanna