I used LinkedIn for years to measure of how many people mentioning Data Visualization tools on their profiles, of how many LinkedIn groups dedicated to those DV tools and what group membership is. Recently these statistics show dramatic changes in favor of Qlikview and Tableau as undisputed leaders in people's opinions.
Here is how many people mentioned specific tools (statistics were updated on 9/4/12 and numbers changing every day) on their profiles:
- Tableau - 18584,
- Qlikview - 17471,
- Spotfire - 3829,
- SAS+JMP - 3443,
- PowerPivot - 2335
Here is how many groups dedicated to [in brackets a "pessimistic" estimate of total non-overlapping membership]:
- Qlikview - 169 [13000+],
- Tableau - 76 [6000+],
- Spotfire - 29 [2000+],
- SAS (+AND+) JMP - 23 [2000+],
- PowerPivot - 16 [2000+]