Honestly guys, in all the go-arounds I have had (i'm crew), including one where one set of wheels touched down, passengers are generally ok. By ok I mean there aren't anyone visibly upset or crying etc etc. Remember also that very few go-arounds are abrasive and the application of engine power can actually be pretty gentle, ditto for the pitch of the aircraft. It's surprising how many people actually know what the score is and a reassuring PA done immediately by the cabin crew does the job. I usually joke that they are getting more for their money and that does the trick with those who might be a tad nervous.
But the way some of the describe things makes it sound like people are grippings armrests, praying and crying in the cabin and 99% of the time it is nothing like that. Indeed, I find the actual take off and light turbulence a lot more extreme than most go arounds.