I have been wondering: what is the cause of the incredible difference in rating between online-play and club-play?  My online-rating is not at all comparible to my clubrating.

Could it be the fact that I'm spending more time on each move than I do in a clubmatch (with 90 minutes p/p)? But I guess my opponent is also spending an equal amount of time on his/her move, isn't it?

I think the difference in rating is at least (probably even more) 150 points.

Can someone explain this, or do you have the same 'problem' ?

This should be moved to help and support. But anyway your opponents are different that makes a huge difference.