hi mate, its neil who you had the leon from, i noticed they judder a bit when when the torque comes on strong in a gear to high, if i was going to give it the beans i would select a gear which put the revs at about 1800 (if you were at a relatively low road speed) that way you get the strongest torque and no judder :-)
ps. im bored of the gti's poor torque, ive found the 1.8t to be pretty gutless tbh although i prefer the interior massively over the leon/a3 interior, im looking to get back in a vxr soon to say there only 200cc bigger their a load quicker