For all the offices, apartments and density it always seems to be a very quiet, even dead part of town.
Isn't it nice then to have such a quiet spot so close to the cbd?

Those photos do seem to have a few people mulling around though but it's not Hong Kong. I agree, considering Pyrmonts residential density, being in the top few places density wise in the country and could soon become the most dense area in the county, and it's growing commercial base, it still has some very quiet spots. I don't think this will remain the case within a few years, unfortunately.
Darling Island still has a long way to go with it's densification, it's not even close to half way there yet. The Fairfax building, at about 25,000sqm, is still only partly occupied. Saunders Wharf residential is also still only partly occupied and all its ground floor retail/commercial are still empty. Sydney Wharf (wharf 8 and 9) is still UC but almost complete.
Then there's the 18,000sqm 6 star campus block UC in Fabians photos called Workplace6 that will house Accenture (lower 3 floors) and Google (top 3 floors). There's also another campus block that will go between Channel 7 and RevyC.
RevyC has pretty much been vacated by the defence department and will add to the area again when redeveloped into offices - (
http://www.skyscrapercity.com/showthread.php?t=560672)
Only the "Darling Island" resi units are fully occupied but if you go onto the property websites there's quite a few up for rent, being between $1200 - $3000 per week so I guess they sit idle for longer periods than most rentals (there's actually pages and pages of Pyrmont resi up for rent but most of it is the upper end which musn't be in shortage - it's another world).
And the only office block fully occupied is the channel 7 offices in the other ex-defence building. There's all the small mix-use offices on Jones Bay Wharf nearby and the 4,500sqm Wharf 10 offices on the other side near Sydney Wharf, but I'm not sure how many of those people would wander out to Darling Island. Then there's the "other" maritime museum building, the wharf 7 "heritage centre" which is always quiet. And I'm not sure how many people from the casino bother to wander over to Darling Island either.
And, of course, I'm the most biased person to comment on Pyrmont but like I've said before, it's the fact that there's always something new going on, and that it's still becoming what it is, that I love it.