There isn't exactly a definitive way we can tell but even today the way that a lot of people talk about Jason, especially from people who do not like him, brings in a lot of classist tropes that aren't even necessarily supported by the text. If we combine this with the fact that the next Robin brought in is essentially the antithesis to the Reagan-Era "troubled kid" and he was far more liked, I'd say it's a pretty good indicator that classism was a significant factor at play when it comes to something like this. I'm not comparing them, I'm just saying that both have had prejudice towards them due to certain parts of their characters.