Sorry if this has already been answered, but I haven't seen it. What exactly does this rom have from Project Butter? Not just the JB launcher, right? Because I don't think the launcher really has anything to do with the term Project Butter. PB I believe refers to things more deeply embedded in the rom that improve smoothness, such as triple buffering. These improvements benefit all apps/launchers on JB.
I don't mean to sound too skeptical, I'm just curious because I haven't heard of PB being ported to ICS, and I haven't seen a real explanation here of what exactly Mobster added besides the JB launcher (which I don't think warrants the term Project Butter).