Speaking as an AP reader who had been lurking on RFF for some time before it was mentioned in AP, rather than one who has recently crawled out of the woodwork, I have to say that Roger's column is - along with Mike Maloney's critique of readers' pictures - the part of the magazine I look forward to most, and invariably enjoy, for the different perspective it brings.
I'd also like to mention that I've just finished reading Roger's (and Frances', of course) book Quality in Photography, and found it very stimulating, even if the second half, relating to darkroom work, went almost entirely over my head.