Hello phillyr121, welcome to Glock Talk. Thanks for the intel report from a Glock, Inc. source.
The posts quoted below are recent intel collected by GT members from Glock, Inc. sources that I've read regarding release of the Gen4 G30 45ACP.
Just so not to confuse other readers, the Gen4 G30 45ACP will not be issued in a separate SF model; one marked SF on the frame like the Gen3 G30SF.
When the Gen4 G30 is available, the Gen4 frame without a backstrap adapter installed is expected to be the same dimensions as the Gen3 G30SF. The same correlation exists between the frame size of the Gen3 G21SF and the Gen4 G21 currently in production.
The Gen4 frame has a different, more aggressive grip texture (RTF3) around the entire circumference of the grip, a larger mag release button that is reversible for left hand shooters, and two backstrap adapters to increase the grip dimension front-to-back (2mm & 4mm). The Gen4 G30 may come with the "•" connector and will include three, 10-rnd magazines.