Thanks, it seems the same as on gingerbread. Just need to sort out much reduced battery life with ICS now!
Initially I was getting TERRIBLE battery life after upgrading to ICS (50% in about 3 hours!!!) with the same settings as before but it seemed to improve tremendously after a few days - I now get 2 days out of the battery...............
I've set Wi-Fi to be inactive during sleep and I also turn off Data conection unless I need it. It's simpler to get to Data now, being one of the five top buttons in the home-screen notifications pull-down. My feeling is that it's actually the Data thing that's improved it all - but I haven't rechecked it.
As for MM, I haven't noticed any great difference as I don't use it too much - I have a Garmin Montana for my nav. stuff.
Hope this helps