I just checked it today hehe.
Information (I'll update as I find out more information):
ROM type: It's not a wipe rom as I installed over KIES. It left all my data as it was.
Install time: pretty fast, like any other ROM.
Speed of the phone: This build is FAST. I haven't had one slow down yet! For example, in whatsapp I've always had it load up and for every contact I have a picture. In my last build, I could see the list come up, but then every contact picture would load (and it took less than a second, but I could see the process go from no picture --> loading one by one, very quickly). Now they're all loaded instantly. No waiting. Applications start VERY fast, but I guess there is still some slowdown. Unlocking my phone is even faster than before. I believe the distance you have to drag (or maybe speed in which to move) has been reduced in turn reducing time to unlock.
Lag: OK. There's still some lag here and there. Overall I feel like it's faster. Hopefully more ROMs in the future will fix this.
Touch screen sensitivity:I find the screen sensitivity just fine. Very sensitive to be honest.
Battery life:will update after more usage
Update about battery life:
[Day 1 Statistics]
I had Endomondo on for an hour with GPS tracking / 3G / bluetooth wireless headset for music (55 minutes to be exact). A couple of phone calls as well for a total of maybe 35 minutes of phone calls (all over 3G). Wifi was on most of the day, as you can see. I've never had "awake time" this high before without having the screen on. I found that strange. I'll do a battery pull now, and hit the sack!