Well just at first glance, I spot this:

http://naked-sluts.us/sextape-com-siterip-2/

The -2 at the end would indicate that another version of this "post" has been saved, and for some reason you have managed to create another post with the same "post" name, and saved it again to give it the -2 status.

I imagine that this might be a small problem in the database, which could probably easily be fixed.

Can you give us another post that doesn't work properly, so we can see if the problem is consistent to my short explanation.
I had a quick search, but all of them loaded for me.

All in all, your posts load pretty fast for me - more or less instantly.