I am well aware of HDs experience, and in things concerned with Approach Control he is a respected contributor.
However, comments such as
60 seconds? A whole minute?? If I'd had two aircraft that far apart at London I'd have gone off and had a cuppa...
and
"Aeroplanes passing 15 miles apart may seem like a lot,"
A "lot" ?- jeezz it's a whole Universe!!!
don't indicate a full understanding of the different environment in an en route airspace, especially under TIBA. If the comments are meant in jest, then the use of smilies might have been a mitigation. As comments to be taken at face value, I'm more than happy to point out a possible lack of understanding.