CDI spark duration

[Stuart Baly]

A couple of weeks ago, Garfield quoted this:
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  "In a capacitive ignition system, the measuring capacitor in the
ignition circuit causes an EXTENSION [emphasis mine, Gar] of the spark
duration, resulting in a more reliable and smooth combustion in the
engine, particularly before it has attained it's normal working
temperature."
==================

Here's yet another CDI project from an Australian electronics magazine, which 
has some mention of this effect.
It's in two zip files, about 1.3MB each, containing .jpg files.

Stuart.