Im make a upgrade for 2 weeks, by the version 7.450 was the Ajax dashboard ( respectively webadmin ) was great the option entries worked very fast,[:)] and after the upgrade on version 7.460 about half changes on the ajax webfrontend be aborted ( my hardware and configurations are the same ) [:S]
The frontend (ajax)is the same but some people have reported that if they make too many changes too fast, the backend system can't keep up. I try not to make too many changes too fast specially if IPS is involved.