Have to agree - your average Joe wants a bat like the guy he sees on TV.
I'd be interested to know how this concept - that a significant portion of the market is influence by what bats favoured professionals use - actually translates into the real marketplace (and by real marketplace, I don't mean some five year old wanting a size one Kashmir williow Adidas because KP uses one).
The most marketable players in England in the last decade would be, in my opinion, KP (Woodworm, Adidas) and Andrew Flintoff (Woodworm, briefly Puma) and we all know how poorly those manufacturers performed sales wise despite the endorsement. Of the batsmen in the current England set up, GN have Cook, Robson, Woakes
GM have Root, Hales
Kookaburra have Bell, Buttler, Ali
New Balance have Ballance
Slazenger have Morgan
Do these endorsements generate massive numbers of sales? I'd say no - they are the biggest manufacturers and their sales are more likely influenced by perceived value due to brand size and market penetration than they are by "oooh, SAm Robson uses one so it MUST be good".