That's a really useful summary, Sharon! 'Twas me that mentioned the Orange Rogue and I hadn't stopped to count the bars but I've usually heard it played at about the speed you suggest for treble jigs.

The only experience I've had playing for Irish step dancers is when dancers turn up at a session and request a dance. I've had a bit more experience playing for English step dancers and can confirm that you usually have to play slower than you would imagine.

Do you have any links you could share?