Yep, definitely. Psychologically you become accustomed to the sound of a particular headphone after a period of time and any change to another one usually takes getter used to as well.
Likewise, stepping up from a lower headphone to a higher one means that sometimes you don't notice the strengths of the "better" one until you step back down. A lot of people are used to 100 dollar entry headphones, sometimes when they try a higher model they don't hear much difference, but after a week when they put the lower pair on it turns out to be something like "where did that X go, wheres the soundstage etc".
Coming to the Beyer T1 from the HD650 and LCD I struggled to appreciate them at first being used to a dark sound, but after listening extensively I loved them. As soon as I went back the the LCD I was shocked at the loss of treble and soundstage, and it felt awkward at the time. Thus I personally love stepping back to each of my headphones after a long period, it is almost like listening for the first time again. You rediscover the subtleties music with the different tonalities and styles of the presentation in each phone. Part of something I love in the hobby.
When I first got the HD650, for me I felt was good but not that great at first, but incredibly as I listened for the first hour I began finding myself suddenly getting into the music more and more. I though, there couldn't be anyway for them to burn in this fast? It just sounded better and better as I went on. Personally for me this has always been getting used to or "burning in" my own perception of the sound signature. A mental thing. I have left headphones in the closet for days to burn them in before and I still think what made the most difference for me having the previous audio palate being pushed aside in my mind and getting used to the new sound. YMMV as some people swear by mechanical burn in, I don't really but people hear differently I guess.
That's just how it is for me, some other people may very well feel differently when listening.
Edited by Saren - 11/10/13 at 1:04am