hi dude.
I just had my final interview a few days ago and pending medical now.
not sure how many out of the 7 of us will be through, will find out when i see them at medical!
anyway to reply to your question. some of us had 1st interviews in mar. some during the walk-in on 17-20th Jun. some even during first interviews last friday only. so it's pretty random. as long as they didn't reply it's not a definite no.
keep trying and don't give up. this is my 2nd attempt and thankfully i got thru the 1st interview~