Yes .in lollipop, there is a noticeable lag in dialer..everything else is super smooth.
I know, everything else is ok, but the lag in Dialer is really troublesome, when the popup box comes up to select the SIM to make a call, it lags so much, and sometimes the call is made in the background but the phone doesn't show that the call is being made, it's still on the recent calls page.
The messaging app also lags quite a lot on my phone, when I type letters, they stutter and come much later after I've typed. Also, when I create a new mesasge and try selecting a contact to Send to, it encounters some sort of bug and goes into some sort of seizure mode, flashing the letter i typed and other contacts alternatively.
These are the only issues and people might be saying its ok na at least you get to play Asphalt 8 without any lag but I'm admittedly now fall into that kind of user cartegory who would just want to use the basic features of the phone without any trouble and nothing more.