JakeS:

I'm not old enough to remember the details, but my impression from the quote is that he overestimates the willingness and ability of EU-12 to move along further integration without Denmark.

You are correct for the following reason: the Treaty of Maastricht created the European Union by adding to the European Economic Community (first pillar, with separate legal personality) the Second and Thurd pillars (Common Foreign and Security Policy, and Police and Judicial Cooperation in Criminal Justice) as well as the Schengen agreement (which had been operating outside EEC structures since the mid-80's among France, Germany and the BeNeLux, and the Euro. There was no such thing as "enhanced cooperation" outside of the single market (first pillar, where it was not needed since decisions could already be taken by qualified majority, if I am not mistaken).

As an aside, I think it's depressing that a Reaganite cold warrior is the most outspoken pro-EU voice among Europe's (more or less) active politicians.

It's just that he belongs to the generation of European leaders who were active before 1995. Anyone from that generation would tell you the same. He's been retired ffrom politics since 2000, hasn't he?

When the capital development of a country becomes a by-product of the activities of a casino, the job is likely to be ill-done. — John M. Keynes