I would say the simple answer is 'yes'. Everything of course, depends entirely on the ear and area where the original being emulated, comes from. But the forearm should taper along with the taper of the barrel, starting out wider right at the lock and tapering to the transition at the entry pipe. This allows for a nice egg shaped lower forearm near the lock, and avoids that awful slab sided effect you sometimes encounter on contemporary work. The upper forearm on some schools is much wider on some schools such as Lehigh Valley rifles where the upper forearm is decidedly "V" shaped, and the thickness at the barrel channel can be 1/8" or more. On other schools, there is almost no wood along the upper forearm - 1/16" to 3/32" being acceptable. But from the lock to the entry pipe needs to be heavier in width, to answer your question. All that from someone with very little knowledge to draw upon.
