Mike, an official Staff members on the OnePlus forum have confirmed that the OnePlus One, the smartphone which comes with Cyanogenmod 11S pre-installed, will get the Android L update within 90 days of release.
See Also: OnePlus One teardown
The main reason why it will take so long is because the OnePlus team has to wait until the Cyanogen team releases a stable version of the CM11 running on Android L. The company has confirmed that even though there is currently a developer preview available for Android L it is not the final code and doesn’t help the team much to start optimizing Cyanogenmod for it.
With Android L it might also be a little harder then with previous versions as Google has made a ton of changes, some that heavily change the way apps run by now using ART instead of Dalvik and the OS is now optimized for 64-bit devices.
As it states, I am Tariq Wahid. I’m currently aspiring to become an Aerospace Engineer and working on a Dual Award Engineering course. I am the proud owner of a Motorola G with Android 4.4.3, and I am looking to buy a MOTO 360 and X+1. As you can tell I am with Android in the Mobile OS “War”. I work for an awesome indie game developing team; Enraged Entertainment. We are currently working on a Science Fiction FPS called Liberico. I’m quite the fan of astronomy and my best subjects are Chemistry and Physics