Chris,

I have heard that P. olfersii has a pretty bad bite but not much about the other species. Withing the past couple of years somebody posted a picture of themselves free handling a large P. olfersii. I think a handful of people jumped in and warned him about that.

The P. baroni keepers I know treat them like they are not a concern.

Personally, I would treat them all the same - like they are hot.
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Current snakes:

0.0.1 Gonyosoma oxycephala - Java locale (green)

1.2 Gonyosoma oxycephala - Jave local (green)

2.2 Gonyosoma janseni - Seleyar locale (all black)

1.2 Gonyosoma janseni - Celebes locale (Black & Tan)