I'm also having the same problems of dropouts from my new Superhub, some devices (my wifes laptop) will rarely connect, my iphone and laptop either slows down anywhere to 1mbps or drops the connection completely several times per hour, every single day. My old router didn't have a problem at all and the new one is sat in exactly the same position, dropouts even happens when my iphone is right next to the router so signal isn't a problem. I've checked and changed my settings as suggested on here, the firmware is updated but still get the dropouts.
After reading through all this, I don't have the time or the inclination to phone up customer services, to listen to some pleb speaking to me like I'm an idiot telling me to reboot etc....I've been there a hundred times and is stuff I always try before I'm that stuck that I have to phone technical help. How many complaints before Virgin recognise the superhub is a pile of **bleep**?
I've been a customer since year dot on Blueyonder and never has the service been this poor...finally time for a change of company methinks