If I understand correctly:
Router 1 -connects to- internet
Computer -connects into- router 1 (say port 1)
Router 2 -connects into- router 1 (port 2)
wifi -connects into- router 2
So all wifi is handled by router 2.
I'd still love to hear how this helps, though, Gratulin. Never heard of this doing anything to help with traffic, really.
I can imagine it helping if you can restrict the ethernet port to a lower throughput than your internet can handle, but otherwise I wouldn't think it will.