I was under the impression it does not matter what your aptitude score is, that's only relevent to get in as a pilot. After this is it no longer discussed or referred to.
Your streaming is dependent on your scoring you get at EFT and is done on a 6 point scale, whereby if you attain a 6 (and some who score 5), get streamed to Linton to continue the basic fast jet training (BFJT).