I must be misreading that link. I didn't see anything where Panasonic and Canon are "dominant" or "prominent". And those picks are only the ones he reviewed.
The site has top picks in each price range. There are 20 receommended cameras in total. Of those 60% are either Panasonic or Canon. Is that dominant? The other 40% is split betweem Nikon, Olympus, Sony & Pentax.