I don't like looking at it this way because you can say that about the majority of Super Bowl teams, or even the actual Super Bowl. You can say that about any competitive game.
What is obvious to back said claims, though, is that this is clearly one of the worse teams in the NFL yet based on record they're right in the playoff chase. The schedule will soon match this team's record with reality though.
No, you can't, because again, there are predictors of NFL success that 1) are very strong, and 2) represent stable characteristics of teams.
When a team performs well in those areas -- i.e., Super Bowl teams -- they're by definition a good team, and the win percentage they have as a function of those characteristics should be expected to continue.
When a team performs relatively
poorly in those areas but has a win percentage that's unexpectedly good, that win percentage should
not be expected to continue. The absence of those winning characteristics will very likely give way to the revelation of what the team truly is, whereas for the Super Bowl team the success will continue.
Again this is where the Dolphins were at 4-2 this year. They were impostors at that point, and they were readily revealed to be who they really were in the subsequent three games.
That wouldn't have happened for a high-quality team that started the season 4-2.
The Rams for example started the season 4-2, and they are now 7-2. The difference? The Dolphins passer rating differential is a horrendous -24.4 (much like it was when they were 4-2), while the Rams' passer rating differential is a staggering +28.7, which is actually better than that of the 2016 Super Bowl-winning Patriots.