[tim_chevalier]

The second point was meant to be about inanimate software constructs: for example, "This guy jumps to that guy without pushing a new stack frame."

The difference between "hi guys and girls" and "hi guys and girls, I guess, too, if you want to get really technical about it!!" is that the second sentence goes out of its way to call attention to the Other-ness of the marginalized group. But why not circumvent the issue entirely and use a gender-neutral term like "folks", "everyone", or (depending on the formality of the occasion) "distinguished colleagues"? It perplexes me that people who have no trouble writing a compiler or debugging device drivers apparently find it so difficult to phrase a simple sentence in a way that doesn't exclude anyone.

[nopassrecover]

I see your point but guys has come to become gender neutral. Sure a guy is still male but "you guys" is anyone.

[tim_chevalier]

On this point, I recommend Douglas Hofstadter's "Person Paper on Purity in Language": http://www.cs.virginia.edu/~evans/cs655/readings/purity.html

Hofstadter makes the same point (that words that claim to be both gendered and gender-neutral are never the latter) in a less snarky way in Chapter 7 of his book _Metamagical Themas_, entitled "Changes in Default Words and Images, Engendered by Rising Consciousness". You can find it on Google Books.