I think I’m being slightly misunderstood, so I’ll clarify just in case.
I was agreeing with @jimsilverman due to the fact that clients are an ignorant folk. Not stupid or slow, just ignorant. If I didn’t know anything about web design/development, I’m sure I’d hold the same opinion that somebody whipping out a shiny Macbook Pro simply new what they were doing with it.
Is that right? Fuck no, but its the world in which we live.
I would never expect my computer to have an effect on a prospective client’s perception of my abilities – I let my work do the talking for me. But I can’t control what a client might think when they, through whatever means, find out that I’m running on a Mac at home.