So, Google Web Fonts now is the benchmark for professional screen typography?
None of the sites that I visit on a regular basis use Google Web Fonts. The only one using any webfont for body text is The Guardian, which uses an excellent custom font designed by Christian Schwartz and Paul Barnes.
http://www.google.com/fonts#Analytics:total . 5th most popular font at the moment ( 2,059,357,755 views for Lato in the last 7 days and 64+ billion in the past year).
And that doesn't even include the Typekit deployments (or locally hosted ones).