From what I've seen (which is all I can go by)...
Chris is capable of playing, and playing well, games that reward 'free time'.
If you're an older dude, Chris' access to free time is like having access to unlimited quareters while playing Gauntlet or TMNT The Arcade Game. It trivializes it.
Something like Guitar Hero where wrote memorization and repitition can carry you far.
He otherwise excels at games designed for children. Specifically games that are expecting to accomodate the co-ordination and cognative abilities of a child.
As far as playing a reflex oriented game? Forget about that.
The highest tiers of Guitar Hero and Rock Band are that demanding, but he isn't in that rarified air. He's playing the same Bob Segar song for the 500th time. It's not 'reacting'.
Even on pure strategic thinking, his storied career in Pokemon CCG and Yu Gi Oh, where he'd play with wonton disgregard for tactics and invariably lose unless he was matched with someone doing the same (i.e. little kids).
That's not all there is to games, but for me personally that's what I'd acknowledge as skill. Manual dexterity and quick wits. These are not words to describe Chris.