TIOBE index

[Gautier write-only <gautier_niouzes@hotmail.com>]

Hello,

From time to time I'm looking at the TIOBE Programming Community Index
  http://www.tiobe.com/index.php/content/paperinfo/tpci/index.html
The results, for long, are not very glorious for Ada, but I told
myself if was like it was.
For instance the latest ranking for Pascal, Fortran and Ada are:

  Tiobe ranking
  --------------
  Pascal  0.603%
  Fortran 0.563%
  Ada     0.376%

Now, I spent a few minutes to look at the figures myself, following
the famous citation "The only statistics you can trust are those you
falsified yourself".
So I made the search engine queries as described there:
  http://www.tiobe.com/index.php/content/paperinfo/tpci/tpci_definition.htm
including 1-year time windowing when available.
Here are the results (the simple queries without time windowing give
similar results):

        Google     Google Blogs  MSN        Yahoo!      Wikipedia
YouTube
 
------------------------------------------------------------------
Pascal  2'020'000  25'027        3'170'000  25'200'000  1'664      232
Fortran 1'510'000  11'768        1'640'000  7'900'000   949        113
Ada     2'140'000  110'310       2'670'000  49'300'000  1'764      70

With the weights being 23% for each engine, except YouTube with 7%, it
is obviously impossible to have Ada's ranking that is lower than
Fortran's and even than Pascal's.
Funny thing: the weights sum up to more than 100%, so don't forget to
divide by the sum of weights!
If you take for instance Pascal's ranking as a reference, the rankings
would be actually the following:
  Pascal  0.603%
  Fortran 0.294%
  Ada     0.668% <- uh-oh, almost the "A" category...

Of course the reference (here Pascal) would need as well a re-ranking,
up or down, which would influence Fortran's and Ada's - this would
mean to gather the full index data!

Did I miss something ? Some "soft factors" ?
I have an Excel sheet for those interested.
Or should we bug TIOBE about their statistics' quality ?
Or publish a fair, transparent index based on the TIOBE idea, but with
the publication of the figures ?
______________________________________________________________
Gautier's Ada programming -- http://gautiersblog.blogspot.com/
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