Well, sort of. I haven't spoken to them, but I've e-mailed and heard back from them. After the game, and after I had given myself a chance to cool down about it (you know, gotten some sleep, had a good breakfast, that sort of thing), I hammered out an e-mail and sent it BCC to the guys. It went something like this:
"So about last night. Diablo2 was awesome as always, but I was really in the mood for some tabletop gaming. I got the feeling that you weren't really getting into the game I had prepared, though. I'm still a bit of a newcomer to this gaming group, and I've only been DMing with you guys for three games now...I'd love to get some feedback.
And if you ever pull out your laptop at my game table again, I will CUT you."
(Okay, I really didn't include that last line. I typed it, but I backspaced over it before I clicked "send.")
The first guy (let's call him Lock) replied, "you were doing fine and it was an interesting adventure setup and all but it just started to feel old you know? it would have been fine i guess if we had used our own characters instead of some sample ones but i know that they might not have worked with the new game you wanted to try. maybe next time we can roll up our own characters using the new rules it might be more fun that way." (Sorry, but Lock is apparently allergic to capitalization.)
The second guy (Stock, we shall call him) wrote, "It wasn't you, man, I think it was just the new game you brought. I had worked all day on my research paper, and I didn't feel much like having to learn something ELSE when I was trying to relax lol. I just didn't want to have to think that much. It was just a lot easier to just turn on diablo and click some goblins to death. will we get back to our regular game next week? I really like the stormlord prestige class in complete divine, do you think I can build one?"
Barrel (the third guy) didn't reply until late last night. "Yeah, sorry about that. You are doign fine as a dm and everyone looks forward to the games, which is something that hasn't happened in more than a year. Our last dm wasn't nearly as much of a hard ass as you are about attacks of opportunity (j/k) but he was always late and never really put any time into his adventures either. I think we were all just bummed that we wouldn't be continuing the game we started a few weeks ago and the new game felt like cheap imitation. Totally not your fault. I have a question, can we use some of the feats in Complete Warrior?" (he goes on to ask about certain feats for his elf monk.)
So that's that. From what I can tell, they weren't personally offended by 4E on principle; they were just in the mood for something different. I don't know what that means for the 4E rules system as a whole, or its appeal to your average gaming group, but there it is.