First: Older Jesters/Griffons have an issue where the toe can slightly tilt forward due to imperfect tolerances in the toe-piece. Go find an early one (you can tell them because the rear part of the toe base is not spiked like the new ones), put the ski hard on a bench and pull forward on the toe. This allows the toe-piece to release the boot vertically (and inadvertently) when a lot of pressure is put on the tails. The new ones are slightly redesigned in this area and do not move forward.
I'm well aware of the bits on a Jester that are metal and those that aren't. What I was trying to say was that the new ones FEEL like they're made of plastic. I've picked one up, fondled it a bit, licked the heel thing to see if it was cold (metal). They appear to have used a thicker paint (possibly to stop chipping?) and it makes the metal parts both look and feel, at first appearance, to be made of plastic.
As for standard toe? ISO DIN specifies 19mm +/- 1mm on the toe-height - the binding hence has to accommodate a 20mm toe while a boot can be as low as 18mm, leaving 2mm of slop at the interface. Amplify this by the length of a person and it's quite a lot of movement.