Lots of semantics. “Upper echelon”. “Elite”. I think what a couple of posters might be talking about is the reputation of a team’s core. If a team has an extremely strong core and they string together a couple of really good seasons, an expectation develops that the core will deliver a lot of wins year in and year out. Throw in multiple seasons of finishing near the top of the standings and now people think of that team as “upper echelon” or “elite” or whatever.
But at the end of the day, even though the expectations are high for these teams going into each season, that doesn’t mean they are a lock for that particular season. Rosters change, injuries happen, core players start to age. So in any given year a team that has developed a reputation as being “upper echelon” team might not actually turn out to be among the best, while another team that doesn’t have a strong regulation actually is among the best (even if it’s just for that one year).