C'mon Martyn, this statement is unfounded. Prescott continues to be on Chicago's heels for the title of "Windy City".
You're correct, modern glues are stellar performers and limit the requirement for complex joinery for high strength applications. Limit, not eliminate. Dovetails have an advantage of single direction lock with or without glue. Apply glue (with any reasonable level of effectivness) to the added surface area advantage dovetails have over butt joints and your results are a joint of superior strength.
I am not being critical of the joinery used in AT Overland composite drawers. I believe the glues used and joinery chosen are the right combination for this product. I am not questioning your companies processes, just the quoted statement.
Purely personal comments I made about glues. As I said I have nothing against joinery, and agree that modern glue and dovetails work well together. My comparison is more historical and applicable to this situation.
The strength of a dado or dovetail glued with fish paste vs. a butt joint with Gorilla Glue, the Gorilla glue would win hands down.
Joinery is well suited for a chair where stresses are applied when the chair is sat on or rocked back and forth, in this case yes a mortise and tenon would provide the extra stability. But in this case we are looking at a drawer inside a case. Butt joints and synthetic glue are ample, durable, and they work. Complex joinery is not required. I think it would be more esthetically pleasing, but unnecessary.