1) Go to the mall, or a train station, or some other suitable public place with a decent cross section of people.
Stop the first 1000 people you see. Ask each one:
- Do you have a Facebook profile?
- Do you have a Google Plus 1 profile?
2) Tally results.
3) Decide whether having a Google +1 profile should have any influence over anything at all.
4) ? ? ?