I have a feeling he'll massively disappoint if he moves to a big club. I just don't see the potential for him to be better than he was last season tbh.
@Fred; I see the opposite, it does seem like he reached his peak, but I'm sure he will at the very least slightly improve in a big club; I see him grow as a player there considering he seems to have a good mentality.
I'd like to know what makes you think he will disappoint, as he has no history of doing that; unlike Gignac prior to his only good season. Is it because you had a bad experience when you got Chamakh? He always was a one dimensional player, and it is difficult to play regularly in a big club when you are one.
In any case, those two can't be compared to Giroud, and they shouldn't be considered as an indication of how good (also in terms of mentality) he truly is. They are not the rule and Giroud should be evaluated on his own.
If he were to play for Arsenal or any other big clubs for that matter, I'm sure he would do great.