Something like 1/3rd of PWC's revenue comes from consulting (officially their "Advisory" arm). They started rebuilding it almost as soon as they sold it. Strategy& is actually only a small portion of the Advisory org (S& is really just the rebranded acquisition of Booz&Company).

Another 1/3rd comes from the Assurance arm, which is kind of a cross between accountants and consultants. The "Tax" arm are the traditional "accountants", but that's only 1/3rd of the company.

It's worth nothing though that a lot of the Tax and Assurance folks traveled to client sites very frequently, too (not all of them, but a big chunk). Really the main groups that worked in-office were the internal firm services (HR, internal IT, internal finance, etc).