Ann: Exceptionally High-Grade V-Zn-Pb Concentrate from Abenab, page-21

"Now, a further 6 months later they finally have completed and shared the test results."

Well half the results and that half does not have the recovery percentage .
The other half of the results are for the downstream processing of the concentrate (leaching) which has not been published .
Yes a sand miner or alluvial cassiterite /gold miner would have those results in a day not 6 months later , but does take a while to fly samples half way around the world in this case .

Still looks to be a great resource though