That is about average. Is it showing any resets/lost syncs or t3 timeouts in your modems gui? Having to reset the router/ modem is caused by the router a lot of times. If your not getting modem resets/lost syncs trash the router. I have seen the best routers less then a year old take a shit and start dropping the connection. If your cat 5/6 cable terminations are questionable at all I would redo them.