Stand and Identify?

To help clear up who I was pointing at and calling on in the feedback session of Penguicon, I spoke their names. There came a moment that I realized I knew the name of almost every person raising their hand. What caused this correlation, if it is real? And what do you suppose that communicated to others who also noticed?

The feedback session was pretty good. That was due mostly to Jer keeping it under control when we got repeat comments. However, do you suppose being publicly identified also deterred useless feedback? If so, what do you think might happen if conventions ask that each person offering feedback in a feedback session state their name?