The man from Luton speaks the truth!
The A345 was intended to fly the longer and thinner routes. The -500 has both a greater fuel capacity and higher MTOW than the -600, therefore the -600 would never be a direct competitor on routes over about 14 hours. Hence the decision to wait until the enhanced variant is available.
It does seem that SQ are operating their A345s on the correct route structures with sectors up to 18 hours, EKs longest sector is about 15 hours.
I think it's been widely known that these are not showing up
I think that the above quote should have been
I think it's been widely rumoured that these are not showing up