Not much of a difference for me. Nexus 4 user here.
Try out their new ART! It does generally run the device and apps faster!
What it does is to precompile apps on install, so they can run as efficient as native apps.
This does increase HDD space required for each app.
Steps:
1. Go to Settings
2. Go to Developer options
[IF you don't see any developer options] go to about tablet and repeatedly click your build number.
3. Select runtime: use ART
DISCLAIMER: this is still an experimental build, it is possible that some apps are not working. Somebody is compiling a list of tested apps:
List of broken apps in Android RunTime (ART)
PS: If you don't like it, it's easy to switch back (and forth). However, the process takes a while since they need to recompile each app you have installed.