I never understood Yuri's involvement. I always thought his investment philosophy was to enter at the Series B or later stage.

On another note, here's a recent anecdote (the plural of anecdote is not data!) about Khosla Ventures. A successful entrepreneur ($300M exit under his belt; CEO of $5B company) was in advanced talks (post-term sheet) to raise funding from them. Out of the blue, Khosla came back with a list of demands such as adding a 3rd co-founder. Obviously just one situation, but left a bit of a bad taste in my mouth.