I've seen lots of C150 & C152 'wind-up' after about 2 turns.
CofG made a significant difference to recovery. I'm only light but I've noticed the recovery varying with the size of my student & his/her seat position.
Also if they don't ensure the throttle is closed &/or don't move the column forward reasonably briskly.
I've had one instance of the recovery being delayed when the student moved the column forward before applying rudder input.
Another where a big burly chap froze while holding onto the controls with them in pro-spin. He'd never properly spun before & was taken aback by the whole thing after he mucked up a stall recovery.
As Genghis said, if the input isn't working correctly reset the system to its original state ie controls to match the spinning condition, & then re-try with thorough application of the technique.