I have to disagree with Tom on this one. A course with 18 holes of 400 yards each is 7200. Driving the ball near 300 yards leaves, wedge shots in on all 18 holes. I think there are lots of players that can do this with todays technology. With todays technology, courses should be extended to at least 8000 yards for the tour professionals. Extending a course to 7000 yards today is like extending it to 6500 yards 20 years ago.
The math geek in me would suggest a course built to not account for touring professionals would come in something like the following from the tips.
150, 170, 190, 220
330, 345, 360, 375, 390, 405, 420, 435, 450, 465
520, 560, 600, 640
total 7015
Ideally, I think the virtual vaseline should be taken off the ball, and we could go back to using much less real estate for our courses.