I agree, while it is possible to match a proof to a press sheet - isn't it a bit more practical to proof to a standard and then have the press match the standard. I know that there is a lot more flexibility in having the proof match a particular press, since inkjets can be manipulated a lot more easily and widely. But, how do you know the press sheet is correct, what if you have multiple presses, what if one unit has a bad blanket or is packed too much or too little when creating the press profile, etc. etc.
In this "new" approach that most vendors tout that your proof will match your press sheet your procedure is basically:
Code:
proof > press > proof > press > color ok
Where you create a proof that matches a press, then when you actually proof a live job the press then needs to match the proof, and then any final color oks.
Where the old school system is more:
Code:
proof > standard \
color ok
press > standard /
Where everything is trying to meet the standard, and then final color oks.
It might just be me but having the proof match the press is just chasing your tail around in circles.