Effexor (venlafaxine) is known to raise blood pressure...Cymbalta not quite so. Is this accurate?

Correct. While all serotonin-norepinephrine reuptake inhibitors (snris) can raise blood pressure, generally those with more activity on norepinephrine levels (effexor, pristiq, (desvenlafaxine) savella) tend to have more effect on blood pressure than cymbalta, which has a 1:1 effect on norepinephrine and serotonin.