That's quite a while, but actually I think it represents a trend we're seeing in HTML5/webdev, which is increased attention to developer experience.

While fancy components and CSS eye candy will continue to roll out, we're seeing even more work on development/debugging tools, the JavaScript language, and with web intents and web components, the seeds of a more robust reuse model. [http://webintents.org, http://dvcs.w3.org/hg/webcomponents/raw-file/tip/explainer/i...]