That UAV was not even remotely LO. It had a sensor stalk and a ball turret for the camera - it might as well have a flag hanging out it's back.Exactly. All we can say is that at least one drone, looking like a non-LO Hermes was shot down by a russian fighter plane, most likely a MIG.
Hermes btw is NOT LO. have a look at the design.
The US was using ram coated UAV's in the 60's and 70's Against the tech of the day, they were regarded as LO/VLO (they regularly ran missions into China)Given that one can make a capable UAV with great utility for a specific set of tasks rather small compared to manned aircraft we might to see soon some of VLO design setting off for the sky.
Considering that VLO UCAV's have been developed for the last 5 years - and are at trials stages - I'm guessing that its sooner than expected.