Jari:
The USGA has been considering that for a long time, and in fact those distances have now changed and been upped a bit. I don't have the exact figures as my rating manual is at home, but it's a little closer to what most consider as reality.
In any case, remember that ratings are relative... it really doesn't matter what these distances are THAT MUCH because they're the same for everybody... That is, the course is going to come out with a rating and slope that one and all use, and all these distances mean are they are part of the methodology used to arrive at that figure.
The one big consequence of changing them is that if you do so too drastically, you also change what recommended distances are for PAR on each hole. If that gets done, that's a sea-change for golf that really must be considered very carefully... Think of the consequences if all of a sudden 500 is the upper limit for par 4, lower for par three... you're gonna have a lot of par 68-69 golf courses, and a lot of others not too happy about having to reprint their scorecards... not to mention the policy implications, basically begging courses to rebuild themselves longer...
Methinks we should be happy with the distances as they are, in the overall. And yes, they have been increased a bit.
TH