If you're talking about the DT770 Pro/80, your characterization is correct. The DT770 2005 edition sounds drastically different than the DT770 Pro/80.
Edit: Perhaps we are misunderstanding the term bright in our communication with each other. There is a noticeable sizzle in the treble on the DT770 2005. Compared to the ATH-M50, the mids are further away. The ATH-M50 has a boost in the mid to upper-mids, which the DT770 doesn't have. That's what I mean by forward. It makes it seem like the singer is right in your face. The DT770 is further back, and helps to create a larger soundstage. It may be artificially doing so, as some music just doesn't have sound stage, but it's not in your face. The ATH-M50 is not as forward as a Grado, but much more forward than the DT770 2005.