This is a novel claim to me. I don't think Glagolitic looks particularly like cursive Greek, and I haven't seen this idea in scholarship. What is your source for it?
I guess I don't see this idea around because it wasn't good enough to survive the early 1950s? I am looking at the tables, and while I can see the resemblance in some places, it's quite a significant stretch in others. The fact that the Glagolitic and Greek examples are cherry-picked from different manuscripts with different styles doesn't help.
