There were a lot of loose braces in the 50's but it turns out they had recently hired a few ex-postal employees who had just been licking the braces.
Seriously though, there are all sorts of different eras, adhesives, construction styles that fall under the name "Gibson", and it would be a pretty broad generalization to group them all with similar traits or properties. The only era I know of with a chronic problem is the RF glues of the 50's, primarily used on archtops. Other than that, yes, braces come loose, but I would say not more than would be expected. Perhaps more details on the era and location of the theorized trend would be useful.
_________________ Eschew obfuscation, espouse elucidation.
|