You're never gonna see ridiculous stat gains like +8 in gen 5 since the stats will automatically update after each battle. Unless you pay attention -very- carefully, you're likely to never notice the gain. Furthermore, the extra stats you gain is calculated differently at lower levels than at higher. You'll notice the 252 EVs no problem at level 100 but at something like level 20, you probably won't see the +whatever points from the EVs. It's there, but won't get applied until later. This is mainly to prevent something like level 5 Arcanine with 80 attack.