As mentioned in another thread, I think sometimes we extrapolate what we see on a few courses of any era and broad brush those characteristics to the who generations of courses. For example, all golden age courses were great because Cypress Point and the other top ones were. On the flip side, all modern courses are bad becasuse RTJ or Nicklaus had design periods where aerial shots were almost required.
To me a green allows the ground game if:
There is a frontal opening for at least part of the green that is more than 30' feet wide
The slope in front of the green is not more than about 10% uphill, which would tend to kill any roll.
To qualify, that opening must be accessible from some part of the fw, but not all, following Golden Age traditions
The question is, how many greens on your preferred course allow the run up shot to at least some portion of the green, by these criteria?
My home club of Great Southwest is a Plummer/Byron Nelson course with 15 greens remodeled by me. (Oddly, the three greens I didn't remodel had been done by their low handicap super and each has frontal bunkers. He told me he thought it was good design to stop the topped shots from reaching the putting surface)
The only other greens, largely unchanged from the original designs, that require aerial approaches are the par 3 third (standard water hole) and par 5 9th and 18th. Of my greens, the 4th has a narrow cat walk approach, and the par 3 6th and 17th and off set 16th have slivers at the sides.
If we count the last 3 as no green front openings, overall this hybrid design from 1979-2008 has 9 each of greens that allow the run up vs. those that don't. If I am charitable on those tweeners, giving them 1/2 a point, its 10.5 to 7.5 run up vs. not.
On some of my original designs, like the Quarry (selected because its designed to be tough)
Holes 1(frontal bunkers),6(narrow ramp),9(steeper slope),13(native bank), 17 (par 3 with pond) probably don't allow the run up game. The 11th, a short par 3 has a sliver, but I doubt many would run it up anyway. So, that's at worst a 12/6 ratio.
My other "tough design" is Colbert Hills. It would have a 14/4 or 13/5 ratio. (Its funny how many greens when I really think about it are tweeners)
On my most recent moderate fee public course, Sand Creek in KS, the ratio would be 16/2, although a few are tweeners.
So, perhaps my perspective is skewed by my designs. However, I think we have enough input here to conduct some informal, but valuble research. It will be interesting to see the results.
Please include the era and if comfortable designer of the primary design of your course. If you keep the answers succint enough, perhaps we can tally them and get a good idea of the true ratio of run up greens in the golden age, 50's, 60's, 70's, etc. through modern eras.