This has made a massive amount of difference in my wireless signal, anyone else use it and noticed the difference ?

I also noticed my ipad connects immediately where the home hub 2 was delayed and I had to connect manually

Are home hubs the routers you receive from BT?

I have two home hubs, one for broadband and one for infinity broadband, but other then the obvious size&speed difference do they function the same.

The home hub 3 has a space for normal adsl and bt infinity and its from bt. Its a lot smaller and neater, the only thing you lose is the broadband talk. It has better wireless tech too