I've made it a point to tally the way prints have been exhibited at the AIPAD shows in NYC over the last several years (although I didn't get to attend this past February). All seemed to be dry-mounted (they were quite flat, but maybe by other means). About half were mounted with a space between print and mat with the other half having the mats cover the edges of the prints. One rationale for leaving a border is to make it unequivical that the 'crop' is the photographer's and not the framer's. To collectors, that can matter a lot.
The other fashion in presentation has been the complete changeover to black frames from silver with only a few (and those were usually color) mounted in natural wood or stainless steel wide-border frames. Save those silver ones though...the pendulum will swing their way again someday.