erratic and quirky and inconsistant between apps
huh? what kindof apps are you using??
like I said: it's windows native, left/right moves between words, up/dn moves between paragraphs, +shift is a select modifier.
Really, there'll be very few regular apps that'll break this behaviour since, if they do, it's a concious design choice and they'll have to 'break' default windows behaviour. Very few interaction architects will do such a thing, even at gunpoint
However, I DID notice a difference in what some programs considered the start of a 'word'*, but these are on such rare occasions you'll more likely immediately remember for the next time.
*try it in your browser's adress bar.