I would disagree, and I'm a developer. Google's
image for Android and Android applications is labeled as "Design
Guidelines" (see
here). A great part of Android's open-platform philosophy is that developers can push the boundaries of what the platform offers in terms of UI and UX, creating new and different approaches to mobile application design. I would argue that they need to push their image for Android out to more consumers through stock devices (such as the Nexus and hopefully upcoming Motorola phones) instead of tightening the reins, so to speak, on how apps work/look/feel.
I'm working on launching a platform-independent mobile service with T-Mobile in the next six months, and the majority of features I've had to remove from the project's build outline are because other platforms (iOS, Windows Phone) don't allow the same functionality for apps as Android does. I'd hate to see Google restrict anything developers can currently do.