That's a nice argument. The only thing that really even comes close to being able to answer it is...
reality.
Look at Apple's sales charts. Put a a little thumbtack in the announcement date for Intel products, and see if there's any support for your argument (there isn't).
I purchased 5 macs in the past year alone, and the main motivation for my purchases?
The Intel switch.
We don't heard about Apple's market sharing rising to above 10% BEFORE the Intel switch don't we. Think about it.