Why is the preview "Open" window so slow?

Hey, there guys!
I am wondering why it is that the new "Open" window is so slow in preview. It opens slowly, and when I select a folder, it takes a long time to index the folder's contents. However, I can open a file in preview using finder just fine. The indexing times are almost identical to those that I got when I first bought my mac. I noticed that after the update to Mountain Lion, there was a tab added to the top left called "iCloud". I'm wondering if this has anything to do with it?
My question is: what I can do to increase the speed of the Preview "Open" command? I have seen a couple of forum posts regarding people having issues opening files, but none of them talked about the open window itself being slow.
Thanks for your help!
- Alpha Spartan A

Agree the new ios6 is much slower. I found this post by doing a search to find out if it was only me. I've done off & on & a soft reset. Neither helped. Everything seems to load much slower & hangs.
Maybe the new apps aren't optimized yet. However, I had one of my worst experiences with the Apple App Store. One would think they'd know how to optimize their own site & app.
I just hope it's not a bloat issue because the "upgrades" are not worth the performance trade offs to me.
Also, the iMaps are definitely not ready for prime time. I tried getting directions between two locations that were very mainstream and the app said it couldn't provide directions. I'll take Google without turn by turn, thank you. At least let us have a choice and let the best app win.

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Why is the preview "Open" window so slow?

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