Hamlet Au ran a poll on New World Notes asking if creative types had stopped creating and uploading to second life. Of the 266 poll participants 121 answered they have. There were 32 others that selected the other option. That gives us a total of 153 or about 57% that stopped uploading content to Second Life™.
You can see the poll result here: Linden Lab ToS Survey Results: Majority of Respondents Have Stopped Created/Selling Second Life Content.
As family points out, this TOS change has gone far beyond just drama. We are seeing a change in resident behavior. I have to wonder if this is starting to show up in the stats Linden Lab tracks. This would be a good question for people to be asking of the user group meetings.