why do these wallets take forever to sync  
[/quote].

7gb transaction history !!!   İt took me 2 weeks !!!
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For those who have sync problems with NYC wallet, did you guys really follow the instruction and correctly create  the newyorkc.conf and copy to the right folder before you run the wallet again??!! 

Normally, it needs 1.5 to 3 days to get the wallet synced if you run it for the first time or haven't done it for long time.  Just double check anything before you post here. Good luck.