Murray a lot depends on the instrument. I find the stretches a little bit harder in E on the tenor banjo but it is still quite playable.It will take players into unusual keys - I was about to suggest that it would be impossible on some of the normal session instruents but I have just managed to scratch my way through it using the D row of a G/D melodeon so the tune can not use the G# and D# that some instruments may not have.
Whatever, I think D is a much more sociable key in a session.
Jon