Hi Clandestino,
That the aeroplane with size and weight of A330, at 60 KIAS will be soaring through the air with grace and elegance of falling refrigerator and that therefore her airborne time at said speed will be most cruelly limited is not just an assumption. It's a fact.
If you look at page 111 of the report, at time 02:10:15, the computed IAS was about 50 kts, the ISIS was 280 then fell rapidly to about 50 kts. The aircraft was still flying perfectly - and bore no resemblance to your refrigerator.
If I'm airborne and stalled - I want to know about it, especially with UAS.
The 60kt logic is normal with on ground logic to prevent nuisance warnings before take off.
There is no mention in FCOM of the stall warning being deactivated with IAS<60kts when airborne.