This argument has gotten a bit silly, since you are all basically in agreement. TG and Hack are saying that people are making purchasing decisions based on the underlying language, and RB is saying that people will make decisions based on whether the software works for them. That's the same thing. If the customer really cares about the underlying language, then that IS what is important to them. They either get their answer and like it or they take their business elsewhere. Both positions are encompassed within this one statement. After all, if you tell a customer that they don't need to know, and they take their business elsewhere, then that should be fine with both of you.

Some people will care, some people won't. Those that do will base their decision on what they find out. Those that don't will ALSO base their decision on what they find out, it's just that they will find out different things.