This is the way I read it.
Dems:
"We will vote for three nominess who would have been confirmed anyway. In return, the GOP promises not to go nuclear if we filibuster. We will filibuster only under extrodinary circumstances, but it is our call as to what those circumstances are. (Psst...When the time comes we will make another deal. Everyone knows the GOP runs fromn fights, but you didn't hear it from us..)
BTW...the President should consult with us before sending a nomination to the Senate."
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Some effin' deal.
Frist did not say he would not go nuclear if they decided to fillibuster. He said all options are still on the table and we will see about the good faith agreement. The Constitutional option has been delayed. That is all. The fight will be another day. In the meantime, 3 judges will be voted on and confirmed. What exactly did we give up? I would say nothing significant.