This release did include some major features, such as the Web Audio API and support for NaCl in extensions. There are a number of other features and improvement

This release did include some major features, such as the Web Audio API and support for NaCl in extensions. There are a number of other features and improvements as well, but just those two are pretty big. As for the double standard you're claiming, people made a lot of noise when Chrome started the six week release process over a year ago. However, it's died down now that people are used to the release pacing. Firefox just started their rapid releases, so I'd expect any negative commentary to trail off in the same way.