With the influx of new Thunderbolt audio devices, I think it is fair to say that the standard is finally gaining momentum.
Avid, Apogee, Universal Audio, Lynx, MOTU and even Zoom (!) all have Thunderbolt interfaces now. Curiously, notably absent is Mac-only Metric Halo, one of the first FW audio device manufacturers.
I think the mid and bottom tier device makers (i.e. M-Audio, Focusrite etc.) will follow suit by NAMM 2015.