The scanner is probably capable of producing a decent scan. I would blame the scanning software that is typically set up to produce "snappy" scans. I think that trying to get your scans to resemble your prints is going to be an exercise in frustration, unless you're willing to process the scans in Photoshop, which probably defeats the purpose. I would assume that most APUG members viewing the photos in APUG galleries understand that it's very hard to represent the tonality and depth in a scanned print.