I attribute the author liking this result from too much "4/3rds
denial" where you are so often defending inferior results against
Canon and Nikon it becomes a reflex. This combo, if the result below
is an example of what they produce, reminds me of what you used to get
slapping a no-name 2x lens on a P&S. Horrible! The Olympus 70-300mm
is supposedly one of the best of its kind, at least on par with
Nikon's VR lens. The converter is supposed to work well with the
higher-end Olympus pro glass. But the combo result below is worse than
$50 400mm f6.3 lenses from the 1970s.
http://forums.dpreview.com/forums/read.asp?forum=1022&message=34041578