Yeah there is a fascinating income bias at play there. Think about it this way, if you are an engineer and you make over 75k a year gross you are in the top 15% of wage earners in the united states, if you make over 100k you are in the top 10% of wage earners.
So if you are in one of those brackets chances are your company is spending a good chunk of change on you and doesn't mind springing for a nice laptop to keep you happy. But from the other angle there are some 350 million people working in this country who aren't in that space. and considering that something like 76 to 80% of Americans own a PC/Mac that leaves a good chunk of people who lead a significantly different existence than most engineers.
