I guess I have never had a job that counts lunch as an hour, or heard of such a job! My wife, friends, etc. all seem to do a 8-5 with breaks and a lunch hour. I guess I've technically been working 45 hours all my life if that's the case.
I've had the opposite experience. Spent 6 years working in one professional position and another year at a second, where my lunch counted toward my hours, so a 40 hour week meant I arrived at work 8 hours prior to leaving work. When I finally started my current position and they explained that my lunch break was off the clock, I was shocked. Now I've added this difference to the things I have to account for when considering a new position.
And, when it comes down to it, all that really matters to me is the number of hours that pass between stepping out my front door and returning through it. So I suppose unpaid lunch time falls in with commute time as time that I'm not technically giving to the company, but is still heavily impacted by my work requirements.
In fact, the main draw of my current position over the last was cutting over an hour commute to 15 minutes, each way. Saved over 8 hours in commute time at the cost of 2.5 hours for an unpaid half hour lunch.