"Hi, I like your profile! Opportunity-growth-challenge-career-blah-blah, let's talk for 15 minutes on the phone. If you're *not* interested, let's talk for 15 minutes on the phone anyway."
Really? I understand that to an average recruiter "talking on the phone for 15 minutes" is a kind of noncommittal activity one can do without as much as waking up. When will they learn that to an average engineer it's something they hate with all their guts?