I find the results to be encouraging for all of us.
Interesting, I find the exact opposite.
I just compared the A77 to the D7000, which has the 16mp Sony sensor.
The D7000 came on top on all DxO measurements: SNR, DR, Tonal Range, and Color Sensitivity.
That's on the 'print' tab, which equalizes resolution; on the 'screen' tab, the D7000 is even better.
Sony pulled a Canon with the A77 - sacrificing image quality for the extra 'umph' of more megapixels.
Canon did it with the 50D and 7D, now Sony is doing with the A77.
Unlike Canon, however, Sony also updated their 16mp sensor (the NEX-5N) and here's the result:http://www.eoshd.com/wp-content/uploads/2011/08/comparison.jpg
This is nicely corroborated by the DxO measurements, btw.