I just returned from NoCal and wanted to relay this observation. I didn't get to as many galleries as I had hoped but the galleries I did get to are about equally split between dry mounting the prints onto mountboard but not foamcore and all had window mats hinged at the top. The most prevalent corner mounted prints were the color regardless of whether digitally printed or manually printed such as Ilfochromes or dye transfers. Of the black and white silver prints I saw and was able to look closely at, the majority seemed to be dry mounted with window matts. All of the alt process prints with just a few exceptions were mounted with cornersand some type of double sided tape which held them firmly to the mount somehow. Talking with the gallery assistants gave me the impression that it was up to the artists as to how the prints were handled and mounted. I will relay what I find about this subject to the forum when PhotoLA comes around in Jan. This is a very interesting exercize.