That's more or less what I'm experiencing with the sound. It's good to hear that they improve somewhat after burn in. I've got a few more tips to try as well.
Mine had roughly 40 hours of as of when I last listened. I've been letting them play since last night, so they'll have over 60 when I get home.
They are clearing up. I found them sloppy-sounding at first with much-to-prevalent mids and a lack of treble sparkle. This has improved but we'll see if it improves much more (I'll have a better idea tonight).
They were burned in around 16 hours before i received them. Been used for around another 20 hours. and burned in an additional 50 hours. So almost hitting 100 hours with these. I think the main areas that were most noticeable in opening up was the bass. I'm not sure if this was "brain" burn-in like Doosley mentioned but when I first got these, they sounded like I turned on dolby 7.1 surround on a pair of iems. Which means everything sounded distant and anemic, and the bass was not really hitting any harder than BA drivers. But after the past week, the veil over the headphones seemed to have evaporated. Likewise the Mids and highs cleared up and outperform my Ety's in clarity but not as sparkly as the UE700s. But again, these sound natural compared to the analytic quality of Etymotics
When I recently A/B'd them again, these sound full and 3D but no longer distant.
Also, I think tips and sealing play a HUGE role in finding the true sound of Aurisonics. I'd recommend looking at the tips thread to find out more.