The important part of the announcement (for me) is that the...

The important part of the announcement (for me) is that the leach solution is reaching 100mg/l compared to 47mg/l expected*. That means the U is dissolving faster and open to faster recovery and thus ( it's why they are getting the 2 &3 columns read).

If your pregnant liquor is loading well you can both push tonnes and target some stuff that wouldn't normally report as ore. It's always a trade between tonnes and recovery. It's likely they will be recovering some extra U at the edges of the well field pattern or be able to target some stuff as ore that wouldn't otherwise be considered as such. As far as I'm concerned the leaching rate is the most important parameter for an ISR mine's productivity.

By comparison, from memory, I think PEN as an alkaline leach failed because it couldn't get it's pregnant liquor to 30 g/l over an extended leach period or higher number of bed volumes.

All IMVHO & Please DYOR.
* I said I'd be watching for this figure.