Despite the title of this thread (maybe it can be updated?), I thought I would add myself as a data point.
Application submitted: 6 July
Application approved: 3 August
I was not asked for any additional documents. But the agent insisted on getting referral letters from each of my past employers, two of which (from >10 years ago) do not exist anymore so I had to rely on my employment contracts. I guess it did the trick.
One or two other posters in some other threads earlier this year said processing took 2 weeks. I'll take 4 weeks as a win.