While messing around in practice mode in the beta I noticed that it's possible to hit a character out of the startup for a throw and get the red counterhit flash, but you don't get the counter bonus damage or the bonus undizzy. On the other hand you can hit the later frames of a throw whiff and you do get the counterhit damage/undizzy with the red flash. I can't remember if it was a thing that hitting someone out of throw startup should or shouldn't be a full counterhit, but red flash + no bonuses is kinda weird.