I am used to looking for punctuation on the right hand side because I am a native reader of the English language. So, I don't think I've ever had to exert myself or do any extra scanning to see right-hand side punctuation in Javascript or English.
Commas first cause more noise on the left side; they distract me because I'm used to reading English and I'm used to reading code that's written in English based programming languages where people generally agree that punctuation belongs on the right side.
Honestly though, I care more about comments than coding style, something that the Joyent guys don't seem too fond of despite the complexity of the Node.js code. I just don't get it.
Commas first cause more noise on the left side; they distract me because I'm used to reading English and I'm used to reading code that's written in English based programming languages where people generally agree that punctuation belongs on the right side.
Honestly though, I care more about comments than coding style, something that the Joyent guys don't seem too fond of despite the complexity of the Node.js code. I just don't get it.