I haven't had a problem with tap and drag with any of ours.
Jamie, so you've confirmed that you can have contact with the edge of the glass panel and it won't affect touch? It's just anything wrapped over and touching the front of the panel that causes problems?
I have not made my frame yet (working on the router table I will use to build the frame), so I can't confirm it. However, I can not imagine there being interference when touching the edge of the glass...there are not sensors there like on the front of the panel. I can confirm that the tape I was using, even when only touching the top 1/4" of glass, caused missed touches and degraded performance.