That is COMPLETELY WRONG!you can breed flawless stats with dito or other pokemon, 2 are inhered by one parent and 1 by the other (don't know what gender represents wich number of stats).
^ not weeks, one great pokemon if you're doing the breeding right can take 4 hours
So if I'm right you just can get 3 IV stats from the parents.
And if a pokemon has better IV than the parents will this guaruntee that the next baby get higer IV than his parents.
Make it any different if both parents has the same IV stat?