Steel and wood are treated differently with regard to their interface with concrete. Steel actually has a bond strength with the concrete. It gets a little better with age, due to some initial corrosion/contact, but then remains (as far as I know) unless there is significant corrosion of the steel and it exfoliates.
Assuming no significant deterioration, I use between 25 and 50 psi for shear-bond strength (depending on surface prep of the pole...25 psi for no prep, 50 for near-white grit blasting). I compute the pull-out resistance based on the surface contact area of the post/pole, then apply a safety factor to the result, usually at least 2 but not more than 4. If the pole is open at the bottom such than concrete or grout can flow into the pole, you obviously get more contact area, but perhaps not as much as around the outside. I consider that the contact area inside is never more than 1/2 the outside area.
For wood, it is a bit different. Initially there is bond to the wood, but as the wood shrinks, so does the bond. I'm not much of a fan of wood embedded in concrete or grout, so I have no real numbers to apply to this. Check with the Forest Products Lab of the USDA...they might have something. I know that you can epoxy coat the wood and get close to the steel values I gave, but I would keep that on the conservative side.
As for breakout, this is affected only by the moment at the pole's fixity. Pullout does not create a shear-cone as an embedded anchor would. It will fail in shear at the interface bond or in direct tension of the concrete annulus. Reinforce accordingly with spirals and vertical rebar.
