Okay, been trying every nightly since r.116 up to r.143 and even Milestone 3 with Liquid 1.25/1.3 and, for me, by far the best powersaving kernel is r.121.
I get a 1% drop every 2 hrs in standby and even when using the phone it doesnt drain my battery fast, I get no lags or any other strange issues, really nice job.
This with 384/1344MHz cpu, 512MHz gpu, hotplug governor and SR on, autobrightness on.
Just shows that every Nexus is different. Thought I'd share this for those interested.
Franco, please keep up the good work and dont let them get to you.
Samsung Galaxy Nexus ---> MinCo v4 with Franco M5+ XXLF1
HTC HD2 aka Leo (in desperate need of repair) ---> NDT MIUI 2.3.7 DEVELOPMENT stable 6.0
Nokia N95 8GB, backup phone, 5 years old, still going strong.