I use Linkedin to connect to people whom I meet when I have no business cards (e.g. the position has just changed/ cards are at the printer). Maybe it is just me, but I have never had luck with HHs, but the Linkedin-HH-cruisers are the worst type: I had one begging for a meeting and then failing to call. When I called up his firm with a polite WTF question, his colleague told me to wait till like 9pm for a call-back. Of course, it never happened,do I used Linkedin in to contact that HH’s boss with my feedback.