Dell sells twice as many laptops as Apple does (making it the third largest vendor). They only carry a "stigma" in a very small echo chamber of Apple fanboys.
Is there any way I can convince you to stop with the 'Apple fanboys' bullshit? It's not furthering whatever 'cause' you have and just comes across as presumptuous.
Based on what I've been reading here on HN, most Apple users are pissed off by the choices that Apple made for the new MBP's, and are honestly exploring their options (as am I). That doesn't sound like fanboy behavior.
A) You should stop the condescending attitude towards Apple's users. It doesn't help anyone you influence anybody's opinion.
B) I believe Dell's sales volume is heavily inflated by all of the government and school contracts they have. Every computer I used in K-12 and most in college were dell machines, simply because that's what schools buy. That makes raw sales numbers irrelevant, because we're talking laptops for developers, not average office workers or students.