Im tad bit confused, i just read a post that said that 5x5 was for definition and 3x12 was for mass.Ive been going for mass and have been doing mostly the 5x5 with good results. Can somebody clearify this for me, because i think ive been doing it wrong the whole time then.

Definition is about your diet. 5x5 or 5x5 Bill Starr? There's a difference, although you should see some size gains with both. Stick with what works for you until it stops working, then switch.

Plus, if you're fairly new to training, ANY set/rep scheme is gonna give you results for a month or so. then the body adapts...and then you need a better designed program with more specific goals.

5x5 is generally for increasing strength, at the sacrifice of adding much size.
3x12 (or 3x10 as I prefer) if for increasing size, at the sacrifice of gaining a lot of strength.

Yeah, that's exactly what I was saying, I think this is about my reply to
n soufianis post a couple of posts down

Chisled,
Generally using weights that require a high energy output recruit your typeIIB muscle fibers. These fibers are larger than the others which are stimulated when performing lift of lower weight and higher volume.

Like Malkore said, when you are fairly new, your muscle development will occur no matter what you do. Down the line, this miracle growth will decline and you will likely want to consider various different tempos and rep ranges.
Like I was saying.. high weight/low rep lifting stimulates your LARGER muscle fibers.