But it's actually the devs that don't own iphones that are more likely to have used node.

Since I'm here, I'll speak up as someone who has an iphone and uses node.

Actually, the

    'percentage of iPhone owners using node' out of 'total iPhone owners'

is greater than

    'percentage of non-iPhone owners using node' out of  'total non-iPhone owners'

by around 1%

But since there are more than 3 times as many non-iPhone owners than iPhone owners, a Node user is more likely to not own an iPhone.

Considering I just picked up my first iPhone and started playing with node.js this week, does that make me weird?

Statistically, no.