A minor digression: the apples/laptops ratio is stunningly high. I had to look carefully to check that speakers had not just shared the same Mac.
Yup. At the last two DjangoCons in the US, if you got up on stage you basically had a sea of glowing Apple logos staring back at you.
I found that at previous PyCon US that I attended, Macbooks made up about 75-80% of the laptops. I imagine its pretty similar at Rails conferences.
I was there with my Zenbook (running Arch). A few guys with macs made comments about it, “ahh, I see you've got the Macbook Air ripoff.” in a condescending tone.
A witty retort eluded me, so I said "Yup." like a plank.