On the recommendation of Jeff Bass, now that the image_hub instantiation was included IN the loop (sad, but it works for now), and with the application of JPG compression to the broadcast images, the system is exhibiting significantly improved latency on the video stream on off-board Raspberry Pi systems. This will give me sufficient speed to run the various scripts that need to watch & process the images (face & object recognition, OCR, etc...) Thanks again Jeff!!!