I am sure the word of mouth on review didn't help much. The noise at 1600 in tests I saw looked pretty shabby.
....on the A100 after the initial introduction because there was a
pent up demand by KM owners who had KM lenses and had been wanting
to upgrade and who were waiting for SONY to satisfy their needs
with a DSLR successor to the KM line. This pent up demand wasn't
enough to sustain those early introductory sales numbers for very
long as that graph clearly shows.