Yesterday, I moderated a panel at TiEcon featuring the heads of product for Google, Twitter, and Facebook — an interesting group, obviously. It was a good, long discussion (hopefully I’ll have the full video to post soon). But definitely one of the most interesting points of the discussion was when I asked Bradley Horowitz, a Vice President of product management at Google, why Google Buzz doesn’t import tweets in real time? His answer was, well, interesting.