Mike,
Not all of the classic era architects had the production output that would fit your characterizations. Certainly Ross, with his amazing number of courses per year and the fairly well determined amount of time he spent on each individual site would result in the kind of methodology you seem to lump all of those guys in.
Let's get a list together of total number of courses, by year if possible, of the top 10 architects of the classic era. This should give a preliminary idea of amount of time on site. I don't know how many courses Tillinghast, Thomas, Maxwell, Langford, Raynor, Thompson and others did in their careers. I would venture to say that few if any did as few as Flynn. He spent a lot of time on site, with a few exceptions, during and before construction. He drew in exact detail and for the most part the courses were built exactly as drawn. Having a crew of workers that worked with him on the majority of projects and construction foremen (Gordon and Lawrence) that worked on nearly all the projects made possible this method of operation. Craig Disher's overlays of Flynn's drawings on aerial photographs prove this.
Here's Flynn's timeline:
TIMELINE: THE GOLF COURSES OF
WILLIAM S. FLYNN
1910
1911 Heartwellville (D, NLE)
1912 Merion GC East Course1912-1934 (C, RD, D) 99A
1913 Merion GC West Course (C, D)
1914
1915
1916 Doylestown (D)
1917 CC-Harrisburg (D), Eagles Mere CC (RD 6, D12)
1918 Pine Valley (A, RD)
1919 Washington GCC (D)
1920 Lancaster (D), Westchester (C), Pocono Manor (RD 8, D 10) I9
1921 Pine Valley (C), Town and Country (AKA Woodmont) (D-NLE), Columbia CC (RD)
1922 Bala GC (D, RD), Glen View (RD) 109, Monroe CC (D 9) 107, North Hills CC (RD)
1923 Kittansett (D), Atlantic City (RD 27), Brinton Lake (D) 114, Cascades (D) 119, Cherry Hills (D), Columbia (RD 2), Denver CC (RD 9), Friendship (RD 3), Yorktown CC Lake (D NLE) 717/1, Yorktown CC River (D NLE) 717/2, Philadelphia Electric (RD9, D9), Huntingdon Valley CC (RD 1)
1924 Burning Tree (C), Eagles Mere-New Course (D), Marble Hall (D, O) 125, Pepper Pike (D) 113, Sewells Point (D), Gulph Mills (A), Springhaven (RD) I10
1925 Cleveland Heights (D), Elyria (D), Manufacturers (D), Homestead (RD 18) 141, Ritz Carlton North (NB) 133, Ritz Carlton South (NB) 132, CC York (NB) 138
1926 Mill Road Farm (D NLE), Pine Meadow (D), Rolling Green (D), Opa Locka (D 18 NLE), Floranada South (D 18 NLE) 143, Manor (D 18/27), Rock Creek Park (D)
1927 Beaver Dam (RD 18), Philadelphia Country Club (D) 132, TCC-Brookline (D 11, RD 16) 148, The Creek (RD), Plymouth (PA) CC (D 9, RD 9)
1928 Lehigh (D), CC-VA James River (D), Springdale (D), Philadelphia Cricket Club (R 9), Huntingdon Valley (D 27), Sunnybrook CC (RD)
1929 Boca Raton South (D 18 NLE) 157, Boca Raton North (D 18 NLE) 158, Pine Valley (RD), Robert Cassatt (NV) 162, J.F. Manne (NV) 160
1930 Woodcrest (D), CC-Pepper Pike (D) 154, Indian Creek (D) 155, George Woodward (NV) 166
1931 Seaview-Pines (D 9), Shinnecock Hills (D) 156, Miami Beach Polo (NB) 167
1932
1933
1934
1935
1936 Normandy Shores (D) 172
1937 Plymouth CC (NC) (D 9), Pocantico Hills (D) 169, Sunnehanna (RD) 137
1938
1939
1940
1941 Pine Valley (RD)
1942
1943
1944 US Naval Academy (D) 175
1945 Indian Spring (D NLE)
Not yet verified (dates and/or attribution):
Philmont North, East Potomac, Glen Head, Tuxedo Club, Whitemarsh Valley
Key
C constructed
D designed
NB not built
NLE no longer exists
O owned
RD redesigned
A agronomic work
NV not verified