Uhm, maybe i did something wrong, but here's whay i did last night.
Scenario 1: Blue weapon with a socketed glyph, put a glyph in the reagents row, UI showed me glyph getting a whopping 5 XP.
Scenario 2: Put a glyph as base and a glyph as reagents (no same type for 2.5xp) and UI showed me the glyph leveling up 1 time (so 100+ XP).
Maybe it's a bug? I thought it was wanted to make people burn out of MoF (since it costs 20k to remove a glyph). It should be that in both scenarios either using a Weapon with a socketed glyph or a standalon glyph as base the glyph gets the same amount of XP.