Customer Funnel Theory - is it working?

I happen to meet a client who is a VP-of india's most recognised tractor brand?

as our meeing went on, he started talking about " HOT PERSPECTIVES"

dont You think HOT associated with Perspective sounds little PORN-type word

and he further explained about FUNNEL THOERY.

i have learnt that in MY MBA, at 2002.

Globalisation. new markets, Niche Markets after all this Jazz ......Is Customer Funnel Theory still working for clients

so i googled for an image of the funnel....it looks quite simple to understand. i think it is time Client look for a new theory....that is really more flat.

let's hope for the next best CUSTOMER THEORY of the world

i think why dont i try?......