HTC just dropped us the following on its plans for updating to the still-unnamed L release of Android: Updates will start within 90 days of getting the code from Google for the HTC One M8 and M7, and other phones will follow.
"HTC is excited about the new features in the Android L release and we can't wait to share them with our customers. We are committed to updating our flagship HTC One family as fast as possible as part of our HTC Advantage program. We will begin rolling out updates to the HTC One (M8) and HTC One (M7) worldwide within 90 days of receiving final software from Google, followed shortly thereafter by other One family members and select devices. HTC Advantage protects your smartphone investment, ensuring you have the best smartphone experience long after purchase."