kinda weird.. my lumia 1320 is enrolled to Preview for dev. i have OS 14219 right now. heres what i see..
when preview for dev is enabled..extras+info is saying Cyan
when its off.. says Denim...
wonder what the update really does for other devices aside from 830,930 and 1520...
This is also the case in my L1020 - PFD ("Cyan"), no PFD ("Denim"). However, this seems to be a glitch with the extras+info since Denim hasn't been rolled out for the L1020 in my country. Simply restarting my phone didn't change what was in my extras+info: still "Denim" without PFD, but says "Cyan" with PFD. My firmware revision number is still the same as what is listed in the official Microsoft website as "Cyan", so I'm still expecting to receive the "real" Denim update when it begins rolling out next year (
early January).
I have no technical information on this, but I'm guessing that this glitch is caused by some of the features of the official Denim update being already available to those under PFD (Live folders, Cortana availability in more regions, variable snooze time for Alarms, etc.).
P.S.
The simple toggling of the PFD in the app seems to affect the responsiveness of my phone, whereas my phone runs a bit smoother when PFD is not checked. Some apps also launch faster without PFD (even when the PFD app is still installed), e.g. Skype won't even launch at all with PFD* but now it runs smoothly without PFD**.
*- I restarted my phone and even performed a soft reset without unchecking PFD hoping that it would improve the responsiveness of my phone - but without success.
**- I didn't have to restart my phone after unchecking PFD to observe an increase in responsiveness, but I restarted my phone nonetheless to see if the "Denim" under extras+info would revert back to Cyan as reported in a recent bug.