Hi wkhatch,
I meet this problem, especially when I'm connected to my server. i thought it was a connexion problem but...
Each folder takes 5 to 15 seconds to be open the first time.
I'm not sure this is a "mavericks" problem as I did not test the connexion in serveral ways. May be I did not make correctly the connexion, don't know.
This is the same if I'm connected in wifi ou directly to my routeur, from my MBP or my iMac....
And I agree with some of you who think it's better to pay 20 € and have a solid os.
By the way, if some guys from Apple could tell us they care, and more, make an action, that'll be great. .
Have a slow and nice day... If tried to drag and drop the sun in France... owh sh... it doesn't work 👿