Yeh a
lot of fans (or maybe it's just a vocal minority), don't seem to like Jesse's epiphany. But they're the ones confused, because most of the posts I've seen seem to forget that Huell pickpocketed Jesse in S4 so they were confused why Jesse would have this massive leap. They also say there's no connection between the weed and the ricin because the ricin was already found (thanks to Walt who was "conveniently" there and found it "conveniently" in a vaccuum cleaner). But it's not that there's no direct connection, it's just that having been pickpocketed by Huell makes Jesse realise about that other time he was convinced Walt had him do it. And because Jesse was at a point where he could see through Walt's lies, it's not that illogical to think Jesse made a leap of logic. While it might not have been 100%, it was enough to act on and Saul had it confirmed. I know I mentioned earlier it might be much of a stretch but actually having read other people's opinions on it, they point out some subtle clues in that episode which actually do build up that reveal, which are genius when you look into them:
- Hank says to Jesse at the beginning "Walt really did a number on you"
- Saul says to Jesse before making the call to the guy "Anybody you want to say your final goodbyes too?" Obviously it would be to Andrea and Brock, which puts them in the forefront of his mind
- In his code speak, Saul actually mentions a broken vaccuum cleaner, again, putting the ricin in his mind.
I also think the key factor in this chain of events is Saul taking the weed off Jesse. It not only reminded him of that time when he accused Walt of having the ricin stolen, it also resulted in the first time that Jesse has possibly been clean in a while, standing there on that road, which probably helped him piece together things more clearly than he would have been had he been on weed. As a result that one foil has set about a chain reaction where things can all come crumbling down.
Also, that restaurant exists in real life and they actually do advertise the making of guacamole there on the table