1) The US and EU would never have made this offer to Iran, and if (hypothetically) we had been stupid enough to do make a bad offer then
2) Iran would have accepted this offer by now, which they have not done.
Bush and his staff are smart people, and Putin is a brilliant guy who certainly does not want a nuclear-armed Iran on his southern border. I think some of the relevant technical information about this offer is classified and/or very advanced scientific information and the writer doesn't have the background & security clearance needed to offer an informed opinion on this issue.
You must have a Zenith Level Security Clearance to know what Iran would or would not do. It’s in my interest as an American to get this nuclear crisis solved so send your address and I'll mail you a plane ticket to Geneva. You can go mind meld with Larijani and sort this entire nuclear mess out over tea - on my dime... How about it? Are you ready to go yet?