28 days of mandatory waiting perion is included in average 45 days processing time. Basically all this says that you at no circumsatnces will get your license before 28 days expired, but should expect it within 45 days.
Another thing to remember is that they count 45 days starting from the day they received your stamped results (obviously, in Ontario). it simply means, if your application is incomplete, they will do nothing with it untill you supply all missing information.
Thanks for the info, looks like I got about another month to go!