This may have already been posted, I apologize, however I am not sure how to determine the performance of my new router in conjunction with my new MBA 2013. When I choose the Airport Utility, I just get a diagram of my connection to my router and some IP addresses. I have 5 full bars showing I have a strong connection to my router, but the connection sucks. I have to keep refreshing Safari to get back online. The Linksys E2500 N Router that I bought for $80 last year was connecting better than my new router. I am thinking that I may not be connected to the AC band, but I don't know how to tell? Can someone please help me?