I use a MBAir too and have no issues at all.
But then, I dont use the Hub for my wifi connections - I have my own good quality wireless equipment and use VM Hubs in modem only mode.
Consider doing that yourself, or do as Gary suggests and connect it by ethernet cable. Yes I know the Airs dont have ethernet ports and so I connect mine (occasionally) using a USB-RJ45 "adapter" - these are cheap from the usual online places
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John
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I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired 2 WiFi,) SH2 in modem mode with Airport Extreme Router. On VIVID200, Talk Anytime Phone, x2 Mobile SIM only iPhones.