From what I've read, this is so early in beta it should almost be considered alpha.
I've tried running Pokemon Diamond on my Dinc running IncROM 1.5beta2 and no luck. Currently flashing a backup of CM7 Nightly 32 to see if it can do any better.
EDIT: CM7 Nightly 32 also doesn't run Pokemon Diamond. Updating to Nightly 34, although performance is unlikely to change.
little humping Android made by me : )