Adrian — Yes, I understand.
Phillippe — "...Most major landscape architecture projects have a city as a client and their interest is that the project is efficient, built with a very specific budget that is approved by accountants. So you'll need plans to back yourself up...." What do yo base your statistic? Usually it does not matter, but in this case you are leading people to believe that a majority of all major landscape projects involve public projects. I do not believe that at all.
Jeff — You cite extremes, and opinions from one element of the equation. Pete begins with a routing plan as far as I know. I have seen a few and have spoken with some of his clients. He may have someone else draw these plans...and he may well do most all of his work in the field, but some plans do exist.
Tom D. — You are probably on target; a manufactured look would occur if you tried to allow machine and detailed plans to work out 100% of the course. The element of the shaper(s) — even if a GCA opted to never show up — would thwart this look in most instances. I think the mind, hand and encouragement of the golf designer is evident in all really good work. Having said that, the "ghost writer" of the shaper, the client, the land — and the plans (no matter their level of detail) — are all part of the finished result.