I don't notice any on my late 2012 model DMR or my XRS.
Not to say that there's absolutely none but it's not obvious enough for me to notice when I'm shooting.
I have. Been wondering the same thing. I find the CA objectionable above 15X on high contrast targets. The resolution remains very good, but the fringing is significant. (Results are on G2 HDMR)
I have the new ERS and can't detect any CA. I have a 6-24 Elite Tactical that shows some, but you really, really have to struggle to see it and I've never noticed it when I wasn't looking for it (REALLY hard).
I have had a 4.5-30 xrs for about a month. It had it but it was minimal. After using it for a while I got used to it but its definitely there. I may have had a bad one though as mine is being sent back for unrelated issues. A lot of it depended on lighting and other stuff. Its only on white that I see it.