I operate out of SIN, and there is no definitely no favouritism towards SIN carriers.
Thanks for the good laugh. Every time I taxi out to 02 I have to wait for aircraft from the Singapore family that push after us to be let in front. Numerous times have to wait extended times for SQ cabin crew to finish their fluff so the aircraft that pushed after us, that was put in front of us by ATC, calls ready.
Then there are all the delays with engines running we get waiting for SQ aircraft under tow.
Dont get me started on SQ climb and descent profiles. The term expedite does not mean less than 500 fpm. ATC should not need to instruct SQ aircraft three times in a climb to expedite. All it does in increases everyones workload.