I'm sure Keith will someday master his languages, with all that zeal and enthusiasm. It is certainly impressive to go from 0 to 25% percent understanding in Mandarin, but to be fair nearly 100% understanding should be attainable in 550 hours.I'm surprised that nobody has challenged that yet. But then again, not that many people have kept up with the comments I suppose.
I don't know who he or she is or what background he or she has or what methods he or she proposes. So is Mr. gbarv speaking from experience, expectations, or what?