According to the NY Times article cited above, McCain's spokesperson says he did make such an agreement:
|WASHINGTON, March 1 â€” Senator John McCain joined Senator Barack Obama on Thursday in promising to accept a novel fund
The promises by Mr. McCain, Republican of Arizona, and Mr. Obama, Democrat of Illinois, are an effort to resuscitate part of the ailing public financing system for presidential campaigns.
But there is a chance that the obituaries for the public system may be premature. On Thursday, a spokesman for Mr. McCain said that he would take up Mr. Obama on a proposal for an accord between the two major party nominees to rely just on public financing for the general election
The manager of Mr. McCainâ€™s campaign, Terry Nelson, said he welcomed the decision.
â€œShould John McCain win the Republican nomination, we will agree to accept public financing in the general election, if the Democratic nominee agrees to do the same,â€ Mr. Nelson said.
Now, I read that as that both candidates agreed. Frankly, they're both being disingenuous, IMO. McCain as much so as Obama. Saying that one who do so if the other did so, and the other saying the same, is just going around in circles. Probably what they intended in the first place, so they wouldn't have to abide by their agreements. Any normal, reasonable, average people would have called that an agreement.