Interesting link! I haven't noticed dd, now almost 3.5 doing this much anymore, I'll have to try to check her out when she's encountering a new word, in case that makes a difference, but I guess she is on to other interesting and puzzling behavior for the most part...
BonusMom, my PG brother would definitely do the sort of repeating you describe, sort of mull over what 'pearl' of great humor he just granted the world...(as his sister, I definitely roll my eyes when he does this, even now, but really in light of dd, maybe it is sort of a mouth-feel thing for him, too!)
