Vio: I wish they would, I could see myself taking violin exams if I got to play jazz

That would be a lot of fun!
skyers: I just went to get my jazz scales book and I wonder if I've figured out where the confusion lies - that the notes are apparently written straight and they're talking about swinging them?
I don't know what it says in the clarinet book, but in the flute one it says:
-always make the crotchet pulse clear
-begin by things of swing as in a smooth, relaxed triplet feel, which varies according to the speed and style of the music played
-stress (add weight to) the offbeat, or reduce weight on (ghost) the on beat.
If the clarinet CDs are the same as the flute ones, they have demos of scales straight and swung after the music-minus-one tracks and stuff.
Am I making any sense??

Hope this is helpful. I think the triplet feel that you're thinking of is the right place to start, I don't think that the notes are terribly helpful...
I played the scales in my exam
1) with a basic triplet dum de dum
2) tongued on the de (offbeat) and slurred on to the dum (on beat) - so I suppose you could think of that as de-yum, de-yum
3) trying to accent the offbeat note
... and got 21. I think the weighting of the offbeat is in addition to the unevenness, not instead of.
Check and see, you may have demos at the end of your clari CDs.
I have heard "swing" that's relatively even to my ears, and swing that's very triplet-y - I think this is why it's hard to notate.
Hope this helps - I defer to these guys totally ^

but sometimes a fellow learner's perspective can help!