I just perused the LinkedIn profiles of candidates in the U.S. presidential race. Interesting exercise. I know ghostwriters were responsible, but the differences in style are still interesting:
Barack Obama writes his summary in the first person, in the tone of business letter to a trusted friend or colleague. It gives the impression that he wrote it himself. Under specialties, he uses full sentences, each with a dependent clause, covering three issues.
Hillary Clinton's summary is also in the first person but has a certain generic quality that somehow does not feel as if she herself wrote it. She includes no specialties section.
John McCain's begins with "Welcome to the official John McCain profile" followed up by a quote (in quotation marks" from the candidate. The quote consists of familiar talking points. He has posted a recommendation for Sarah Palin. Specialties listed are unadorned phrases. ("Straight talk, politics, history.")
Sarah Palin's page has no introductory sentence, but also uses quotation marks around the candidate's statement." She has posted a recommendation for John McCain. Among her specialties- "attacking good old boy networks."
The profiles give the impressions that Obama's campaign is comfortable in the online world, Clinton's doesn't quite get it, and McCain/Palin's seems to communicate in a manner more typical for television than for online.
Oh - and Bill Clinton was inaccessible - not in my network!