And here is the report :
https://vaadin.com/gwt/report-2012/
1300 respondents who answered 30 questions. The report is 20 pages and full of data, charts, stats and commentaries !
Here are some conclusions from the report :
- compile time and widgets quality are the worst features of GWT
- cross browser compatibility is the favorite feature
- size of the uncompressed obfuscated JavaScript is mostly between 2M and 10M
- most popular framework/API to use the MVP pattern is GWT 2.4 Activities and Places
- backend communication is mainly done with GWT RPC