cgminer: Locally Generated Work - Good / Bad?

[Go3Team]

I've tried to find out exactly what this means and basically all I could find out was "during slow server providing work".

I've had the program running about 15 hours:

 [2013-05-11 08:51:00] Accepted difficulty shares: 3861                   
 [2013-05-11 08:51:00] Rejected difficulty shares: 12
 [2013-05-11 08:51:00] Work items generated locally: 7571

Is that number too high?

Thanks.