Pretty much. Like I know Peter more or less debuted the exact same age as the OG X-Men, with Johnny Storm hypothetically being about a year older than them. And yet characters like Scott, Jean and Hank are definitely written as if they're older than Pete and Johnny now in the present. lol
Not to mention even with some of the "younger" characters like Magik, X-23, Squirrel Girl, and the Young Avengers crew it feels like Marvel can't make up their mind if they're actually in their 20s now or just their late teens.