It's not really the style or schedule that matters. It's the amount of effort you put into your workouts. Very few know how to focus and put forth maximal effort when it's called for. Most people I see lifting are simply going through the motions. Some questions you may want to ask yourself to know whether you are working out hard enough.
1.) Have you thrown up while working legs?
2.) Has your nose ever started bleeding while deadlifting, doing dips, etc?
3.) Have you hit yourself in the head with a dumbell because your tricep just quit?
4.) Same as #3 but with a curl bar or barbell...
5.) Have you ever wished someone would amputate your arms so your shoulders would stop burning?
6.) Have you ever had to sit or fall down after a set of squats?
7.) Have you ever been concerned that you wouldn't be able to defend yourself if you got in a fight within 24 hours of a hard workout?
If you can't answer yes to all of those questions, you are doing the opposite of overtraining.