The Guides Choice will be an awesome woods/hunting rig for the G40. At the time of announcement, Glock made an agreement with DiamondD about building the first holster for it, and apparently they sent a plastic form. However, once the guns actually came out, Glock decided to go with full width slides like on the 20/21, so that meant a new holster design. They told me that Glock should be sending an actual gun within the next month. At that point, they are going to modify it with suppressor height sights, and also account for any optic used in the MOS system.
What I'm wondering is- The guns at SHOT show were built very early this year, and probably have the same narrowed frame like the 41. But those were all no doubt just show samples, and Glock got those back, before redesigning it. That does explain the extra wait time though. It wasn't just the fault of the G42 and 43 coming out.