We homeschool, but even if we weren't, I wouldn't have sent him. Probably woudn't have sent him to K, either, since it's not required. Heck, in WA kids aren't even required to be known to the district until they are 8, so....
To me, it sounds like...preschool is a place to get used to being in school. Honestly, K sounds like the same thing. I went to Montessori from 4-6 yo, which is VERY different from the elementary school I went to, but I did just fine in 1st grade (academically and following the rules-wise). Was much further along in all ways than the other kids in 1st, except that they'd all forged friendships in K. But I was shy to begin with. My brother did Montessori from 2 (not usual for a proper Montessori school, but my mom knew the owner and they made a huge exception for him b/c he was crazy-smart and crazy-social) to 6, and he went right into 1st like gangbusters...he's just much much different than I am, in terms of shyness etc etc. He also had friends in Montessori, which I never did, it was just a personality thing.
I wouldn't give a rip if teachers "can tell" who went to preschool and who didn't.
School is for learning. Teaching should be done. So if kids need to sit in a circle in order for the work to be done, the teachers get to help the kids learn that.
DS (coming up on 6) is terrific with people of all ages, but has been a bit bowled over by the afterschool, cooped up all day, given big shots of sugar ( I see what they eat on their way into the gym) between school and dinner, gymastics kids, but he's figuring it out! He stands on the line just fine, he follows his gymastics and swimming teachers perfectly now, and is done with looking to me for encouragement, and now asks the teachers in a clear voice if he didn't hear them or has a question. Which, frankly, was a place I didn't get to until I was 24 (public schooled from grade 1 on!), so I'm pretty impressed!
He's doing great, despite no "preschool" and despite doing K work at home. Thank goodness so many of the instructors at the Y were homeschooled themselves (not sure this is the norm at Ys, but it's been really great for us!) and they know that some kids just need a bit of extra learning time for the extra stuff like standing on the line...though actually, at least with the groups he's in, it seems it's the kids who were just let out of school who need extra help in standing on the line (though certainly not ALL of them)...
So OP if you want to send DS to school to learn how to do school, send him. If you prefer to wait a bit, until school is more about learning about subjects, then wait. I know which I would choose.
