In some aeroplanes, that may work - on the other hand, pick the wrong big input and you might just drive it into another (and less recoverable) spin mode. Aileron in a Bulldog springs to mind. Or power in a Tucano left hand erect spin - which tends to stabilise the spin and make recovery much more protracted (when we were doing spinning trials on the Tucano it fairly consistently would NOT recover from that mode with full power and then few more turns once it had been closed).
Actually, that advice comes across to me as downright foolhardy - it might work, if you get lucky, but given that any certified aeroplane will have a tested and approved spin recovery, and any aeroplane has a better chance of responding safely to a "standard spin recovery" than a randomly selected large control input which *might* destabilise the spin, but equally might stabilise it, or disturb it to something nastier than the mode you're in already.
G