Getting back to normal

Eyjafjallajökull screenshot as of 12pm GMT 21st April 2010.
See below a similarly timed Flightradar 24 screenshot showing the 60% of flights with their transponders turned on merrily bimbling around the skies of Europe with no reported problems at the time of writing. For the worry warts out there, NASA are doing a splendid job of reporting with satellite analysis here.

Business as usual, but the question remains, was the total flight ban an over reaction caused by a lack of information on the robustness of Jet engines and the density of the plume at given altitudes? The politicians say no, but then they would, wouldn't they? Class action lawsuits looming?