its a crummy solution. i cant believe im goolging this same problem "yo" "w/" "thurs" etc.. and there is still no alternative to filling up my addy book w/ bogus dictionary entries...
...in my test thus far it seems to work. only thing it doesnt do is adjust AutoCorrect -- the annoying way ios turns Des into DES or gras into GRAS ("des moines", "mardi gras").