[quote="nudel"]Try Opus 9.0.0.1 to see if it's better:[ul][li]...[/li]
[li] In Single Click mode, reduced the delay between a click and the action taking place (previously it used the system double-click time, now uses half the double-click time)[/li]
[li]...[/li][/ul]Full list of changes here: [Directory Opus 9.0.0.1)[/quote]
Much much better. 
Thanks 
In the future, if it's possible, the delay should be user-definable, I think.