There is another thread running on Gorilla Glue in which I posted a note this morning about the confusion that surrounds 'Gorilla Glue'.
Originally, 'Gorilla Glue' was a specific brand of polyurethane glue. More recently, the brand has expanded to include a wide variety of adhesive products, including even duct tape!
You said that the 'tube of Gorilla Glue' said it could be used 'just like E6000'. E6000 is another instance of a name that originally applied to one product, and that has now been applied to a variety of different products intended for different applications. My experience with E6000 is limited to the contact cement (liquid) version where you apply the adhesive to both surfaces, and allow them to become tacky before pressing them together. But I believe that there are thicker formulations packaged in tubes that work differently.
As far as I can tell from their web site, Gorilla Glue doesn't come in a contact cement version - yet, but at the rate they are proliferating products, that could change at any time. But the process you described sounds like the way that a contact cement would be used.
I'm no expert on Corian, but the information I have found suggests that the preferred adhesive is a two-part product produced by DuPont (who make Corian) specifically for this purpose. However, I have seen some postings in the craft world that talk about using CA glue, or solvent-welding (plexiglass) adhesives on Corian.
So I suspect that the problem is that the adhesive you used wasn't appropriate for the job.
