Now, are opinions almost instantaneous sometimes, following directly on the heels of sensations and prolepseis? Sure! I have no problem with that. Consider you're walking through the woods, your sensations register a long skinny shape on the ground, your prolepseis have identified this shape as a danger in the past (the grooves are well worn in your eye's and mind's apprehension of the shape... so the "prolepseis" slips right into the groove, metaphorically).. your reason jumps in with "Snake!" and you jump back. It is only seconds later that you realize it was a discarded rope. Your opinion was in error...
In a manner analogous to pulling your hand from a hot stove, I would interpret jumping back from the "snake" as a reflex rather than an instantaneous opinion. As I understand it (for the moment at least), opinion occurs when you realize that it was a rope, based on the additional sensations from looking at it directly. However it could be that this isn't opinion either, but instead "focusing of the mind" on the object. You have a prolepsis of a rope which somehow comes into play when you focus your mind on the object.