Yes its true, but glass bedding is still a cheap "quick fix" substitute compared to a suitable walnut blank (i.e. one specifically selected so that the grain lies in the correct direction, etc) that is properly shaped and inletted by a master craftsmen. How many classic British rifle stocks do you know of that have split because they were not glass bedded?

Each approach has its place (and price) but if I was going down glass bedding route, I'd go the whole hog and have a good laminate stock.

JMHO