If I were the buyer, I would be seriously dissapointed, considering its a $1000+ lens. I don't own 1.2L, however I have several 50mm lenses. Even my $50 pentax 55/1.8 or Canon 50/1.4 is way way sharper than the images mentioned here. The only good image of the set is the sweet child's portrait, and then its more because of the child and her dress than the lens itself. OP may upload few images with manual focus and ISO-100, just to confirm.
Thats it. You dont have the 50L. If you would have it, you would know that the 50L is different
Stop it down to 1.4 and the Canon 1.4 version looks not so nice anymore