have you noticed any big changes in the amount of stats you're getting when you level up? it's just at higher levels, you can do all the training without levlling up and look at how big your stats got :)
at level 10 i'd say there is no idea to tell XD. have you levelled up during the course of EV training it? also, for future reference, you might want things like rare candies, or to level it up a bit more in the daycare. if you don't have many rare candies, i'd start at level 20. but since i have a colossal stock of them i start at level 80 :P