Started with a 7'6 cortez minimal last february and now I've bought a BIC 9'4" epoxy composite last month (supposedly not the "bad" BICs cause it's the epoxy thing). I'm getting the hang of it quite quick and having lots and lots of fun

Now the question is this; why are they supposed to be crappy boards? A shaper told me so, people say so...
I have read that weight is NOT one of the reasons (16lb / 7.5kg), but then what is/are the reasons for the unique crappiness of the plastic pigs?
I got mine cause it is incredibly tough and I have had the chance to see this for myself when ramming into a fiberglass board yesterday. Not a scratch on my BIC and a hole on the other girl's board you could literally put your fist in. Wasn't my fault though.
I'd appreciate your opinions. Thanx in advance.