ctein quote: "...Minolta Dimage Multi Pro scanner, and it resolves 4200 PPI in the center of the field and 3800 PPI at the edges. 80–90% of theoretical resolution at a scanner's upper limit is very good performance"
my black and white photos of the Mendocino Coast: www.jonshiu.com
I didn't read the article too thoroughly, but if its meant to be some kind of bar, where you make a statement about what is possible, and what isn't, it ought to be done on a drum...
Just my 2 cents....
Museum Quality Drum Scanning and Printing