Dani - I think it is probably a language issue that is causing a little confusion here. I assume you mean "I really doubt that they could have recovered,"? Otherwise the sentence does not make sense. I would also dispute the words 'deep stall' - they were 'fully stalled', and in all probability NOT in a 'deep stall'.
Regarding recovery - yes - it would not be easy, and is not trained, but remember IAS indications returned fairly quickly..