It appears fragmentation problems haven’t slowed adoption of the Android platform. Google’s vice president of mobile platforms, Andy Rubin, today tweeted that the company is seeing 300,000 Android activations per day. That’s up a lot from just four months ago, when Google CEO Eric Schmidt announced that the company had hit 200,000 Android activations per day.

Apple CEO Steve Jobs has been vocal about his skepticism about how Google records their activation numbers. In a keynote at Apple’s iPad and Apple TV event back in September, Jobs said: “We think some of our friends are counting upgrades in their numbers,” something Apple doesn’t do.

But Jobs’ comments were quickly rebutted by Google. Shortly after Jobs made the claims, Google rebutted via comments made by a spokesperson to Fortune Magazine. “The Android activation numbers do not include upgrades and are, in fact, only a portion of the Android devices in the market since we only include devices that have Google services,” the spokesperson said.

As of September of this year, Apple claimed to be activating 230,000 iOS devices per day, which would include iPads and iPod touches.