We had our meeting yesterday evening and thought I would now post the outcome.
The Psychologist first gave her report (sons stats) from the test, of which she said he did infact do very well, mostly average and above but with some knowledge below average. On this conclusion she advised would be good for him to repeat klasse 5 if the gemeinde/education board allow.
After much discussion and too and fro-ing with the teachers, psychologist and of course my son. We in agreement for now think Klasse 5 repeat would be best. If between now and summer he suddenly clicks better with the deutsch and maths they may then consider Sek.
His teachers were infact very supportive to us and explained everything in full, as the schooling system here is very different to the UK education system I know, (Psychologist was very quick in telling me to stop comparing!) But my sons' teachers were more helpful and understanding of my points etc.
So from what I can gather, they say there are holes in his knowledge which at the moment due to still not having full understanding of Deutsch and the fact he still turns maths into english in his head before answering I can see this point, they feel to give him a better chance with a Swiss education would be to make a special case for him and allow him to repeat klasse 5 and then hopefully he would progress well through Sek or even BiZ!
There are only 4 Cantons in Switzerland that only go up to primary 5 (Aargau being one) the rest do continue to do a further year.
As many of you said there is certainly not a stigma here with repeating, kids are very mature with this and seem to be more accepting than say the UK. (maybe repeating yrs is something the UK should look at if kids are struggling or come from a foreign background)
Having discussed this fully and now having a better understanding of the Swiss High School System I do feel that for one year now is probably the best for our son, but for any of you who have yet to come across this kind of situation please keep an open mind and think of your child individually and what is best for them.
Thanks again, and if there are any other changes I will certainly let you know.