Hm, I am split on that. I rarely tweet during talks, but I love the immediate backchannel. I usually forget about some points of the talk or I cannot find someone to talk to afterwards and the backchannel helps with that.
I learned that by force: on RubyKaigi 2009, there were IRC screens right next to the slides - mostly for translating the talks between english and japanese and vice versa, but also for commenting and all kinds of fun. So, depending on your language, you had to consume the IRC channel if you wanted to follow the talk. You could even read what was going on in another room. I enjoyed it a lot.
As a speaker, I am okay with it: I always spoke in front of tweeting crowds :).
I learned that by force: on RubyKaigi 2009, there were IRC screens right next to the slides - mostly for translating the talks between english and japanese and vice versa, but also for commenting and all kinds of fun. So, depending on your language, you had to consume the IRC channel if you wanted to follow the talk. You could even read what was going on in another room. I enjoyed it a lot.
As a speaker, I am okay with it: I always spoke in front of tweeting crowds :).