Within publishing, especially periodicals like newspapers and mags, the Times family totally dominates other serif fonts and the Helvetica family dominates sans serif.
One reason for this is that they handle justification superbly. Another reason is that many workflows were created using these and it's cost effective not to have to change those flows.
Using OSX 10.3.9 & 10.4.11 on a G4, G5 & Intel Macbook