I'm not claiming all Med Schools ignore AS results, different Medical Schools use them in different ways, but many of them do, indeed, ignore them completely. And as some of them publish how they score applicants for interview, so it is wholly transparent (Nottingham, for 2015 entry, for example, publish an entire document as to how they score applicants:
http://www.nottingham.ac.uk/medicine/documents/ugstudy-docs/school-of-medicine-scoring-of-applications-2015-(a100).pdfand in it they say:
"Achieved AS Levels:No points are awarded for AS levels; however AS results MUST be declared in the ‘completed qualifications’ section of theUCAS form."
Manchester also state on their prospectus:
"Applications from students who fulfil the minimum academic requirements of Manchester Medical School are examined in detail by our admissions team. We give particular attention to adherence to our entry requirements, examination grades already achieved (GCSE, A2, degree), your personal statement and the reference from your school/college, and your UKCAT score. We also take into consideration any evidence provided about extenuating circumstances. The purpose of this assessment is to identify candidates for interview;it is not possible to gain entry without an interview."
As you can see, no mention of AS grades at all. Their minimum requirements are to be predicted 3 As at A2, 4 subjects to have been taken at AS level (no mention re grades) and 7 GCSEs 5 at A/A*
So am not sure what was going on with your friend-my son was interviewed at Nottingham with worse AS results than those you mention).
And ALL Med Schools use predicted A2 results-if you do not meet the stated minimum necessary predictions (which for all bar, I think 2, are at least AAA), your application will be on the rejected pile before it is even considered. I agree Schools often inflate predicted grades, but Med Schools do look at them.
And you need to get away from the idea that there are Medical Schools "nearer the bottom". All Medical Degrees are ranked as highly as one another, and League Tables etc are completely worthless for medicine, but if you are looking at them, for 2015 complete university guide, Aberdeen was 5th on the rating scales, Newcastle 9th (Durham is scored with Newcastle) and Nottingham 14th, so hardly "bottom medical schools".
Out of the 30+ Medical Schools, at least a 3rd of them place no, or very little, emphasis on AS levels (for example, the Scottish Unis rarely use them, as do not have the same further education system as in England).
Unless you have read the Prospectuses of all of the Medical Schools, then I feel you are arguing about something of which you do not have knowledge. And if you have read them, then you have not understood them properly. I have read them, ticked off the "AS grades counted or not" box and know they do not all take this into consideration.