Hi All,
I have read this thread all the way through and sympathise with everyone; failing your driving test is one of the worst feelings ever - I failed three times and finally passed this morning on my 4th attempt. I wasn't sure what I was going to do if I didn't pass, as my theory runs out in 3 days and I don't think I could have afforded to go on. (passed with 5 minors)
Anyway, I have a few comments (please note I am not saying all these are true, these are personally what I have found from my driving experience, and I hope they help someone):
1) It really can be up to the luck of the day. On my second test this man ran out onto a zebra crossing about half a second before I came up to it and the examiner had to use the dual controls. You can be a superb driver and encounter a situation you have never encountered before. Think of it as a learning curve, you'd rather the situation happened on your test where someone has dual controls than in the 'real world' when something terrible could happen.
2) Some examiners really are mean/harsh. The one that passed me today was exceptionally chatty/friendly and kind, whereas the one on my second test was stiff, uptight and rude. And I think it made a huge difference. A lot of the time people blame the examiner for their own errors, BUT occasionally it can be their fault.
3) Test marking is NOT objective. This is one of the key things I've found about tests; on one test you may fail for hitting the curb, on another you may not. It's like exam scripts; examining a driver can never be a wholly formulaic activity.
4) Saying that, you can improve your chances by adequate preparation. On my 1st and 3nd tests I thought I was a pretty good driver; now I cannot believe I even considered putting in for my test back then.
5) This may seem an obvious thing, but don't forget to concentrate fully. Forty minutes is a long time and your mind can easily wander. Make sure you are well rested and are not thirsty/hungry.
6) The driving test I passed on was booked right in the middle of my second year University exams. I think this helped IMMENSELY. I wasn't too bothered if I passed or not as I had bigger fish to fry. Try not to set a date that is void of any activity apart from driving. If you do it is easier to get more nervous.
7) To the two people who get the shaking leg thing, I couldn't help but smile when I read that. I get PRECISELY that and I thought it was just me. It's the weirdest feeling ever, seeing your thigh go up and down when you have no control over it. My examiner saw this and said not to worry, and that I should calm down.
8) In relation to the subjective marking thing, this can be a bad thing, but it can also be a good thing. In the test I passed, my left hand reverse was ATROCIOUS. Engine revved the entire time, I ended up a metre and a half from the kerb. Took me ages to put right and I was panicking the entire time, was convinced I'd failed but I only got a minor. If I'd given up then, though, I think I'd have lost my concentration and got other faults.
Hope these helps; good luck to everyone taking their tests soon. You WILL pass at some stage; it really is just a matter of time. I know it's annoying being a learner when you can actually drive, but the driving test is just a means to an end, and at some point you will be able to drive legally.
Best of luck!