As I've said in another thread, I went to an Apple store with every intention of switching to MBP and am now actively rethinking this decision based solely on my interactions with the salespeople there. I've heard similar stories elsewhere.
I find this phenomenon to be really curious, because a poor sales-force is worse than no sales-force at all.
You've heard similar stories elsewhere. Let me guess: the internet?
You are more likely to hear negative review on forums like this one than positive ones. Mainly because people aren't going to spend the time to write about good experiences.
But Apple consistently receives high marks for customer service. I don't see how they could continue to get those awards if everyone had poor service.
There are certainly bad apples (no pun intended) out there. But that doesn't mean its a "phenomenon."