Is learning math like learning a language, in that there's a certain cutoff age (pretty young) that you need to start learning by, otherwise you'll never be fluent?
Is the novice older brain malleable enough to really grasp the concepts required?
I'll leave "older" mostly up to interpretation, but let's say young enough that you still have time to put in the 10,000 hours Malcolm Gladwell says you need to become an expert, but older than many people are who have already graduated with a Ph.D. in math, say, over 30.
Can you teach an old dog new math?