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Talent flows like the tides in Silicon Valley, with executives flocking to the hit companies and leaving the duds high and dry. Which is why we guessed, correctly, that TiVo's Steve Sordello was headed to LinkedIn, and why we weren't surprised to hear that Yahoo vice president Patrick Crane is also joining the hot business-networking website as its vice president of marketing. But we wonder how much due diligence LinkedIn did on the execs that just washed up on its shore.One Valleywag commenter claims Crane, a protege of Jeff Weiner, is "truly nasty." If you have details on why someone might say that of Crane, who looks mostly harmless in this Flickr photo, do tell.