Yes, the creme filling is very sweet and thick. That's one reason I can't imagine eating an egg as big as that guy created. The normal eggs are fine, they have a good chocolate to creme ratio, and they do look like real eggs. I always make sure I get some at Easter, but I never eat two at once. I find that they're too sweet for that.
Rei-chan, all we actually know is that someone bought it. There's no guarantee that the buyer will eat it. Maybe the buyer is going to cut it in half and laquer it or something to preserve it, in order to show off a giant creme egg. *shrug*