Zenter founders and YC grads share their Google acquisition story (audio interview)
grid7.com
grid7.com
One, having zoned out reasonably much in my undergrad career, I can tell you that zoning out is not something that hits a threshold, and then you realize "I've zoned out." That is, unless you're consciously zoning out, in which case you consciously aren't interested in the material, in which case you would never press the button, since you don't want the professor to get mad.
Two, that assumes that everybody has a laptop (generally, only 20-50% do), AND, even less plausibly, that they're all looking at the professor's presentation with their browsers. (probably 1% of all undergrads would ever do that)
I remember them saying at the end of the winter that I always "turned out" to be right about design questions. I should have realized that "turned out" implies they didn't believe me at first.
You have to remember the environment we were in. When you are building a product, everyone wants to give you advice on how to do it. It is often very difficult to tell a good suggestion from bad one when you are in the thick of it. The most effective way we found to filter out good from bad was to mock up the suggestion (no more than 1 hour). We then looked at the before and after and tried to make a decision based on what we observed. The hard part for me was keeping my emotions and ego out of it and allowing myself to think clearly about what is the "right" solution.