Here is a quick scan of Kodak Gold 200 (C-41) at EI 200 in PCB for 20 mins (19.5C) with minimal agitation (60 sec initial inversions, 10 sec inversions every 5 mins). It was scanned on a Nikon Coolscan 9000 with no adjustments as Color Negative 16-bit Grayscale TIFF, re-sized and converted to JPEG. Please excuse the mess and water marks.
It has more grain than proper B&W film. Not bad considering no post-processing was done.