> It was interesting to observe that since this was written, both F# (from 67 to 32) and Lisp (63 to 29) have risen dramatically on the TIOBE index.

The TIOBE index is pretty much meaningless for any language below the #5 spot, under which the percentages are so infinitesimal that the ordering is completely useless.

For example, a jump from 63 to 29 means the market share for Lisp went from to 0.12% to 0.37%, and I suspect the error margin is several times that delta.