Mark,
Instead of being pugnacious, try this, using any glossy media you prefer (I like Pictorico HGWF) make the identical print from any pigment printer you so desire, then make one using an Epson 1280/1290 or Canon I9900, just tell me what you see? I don't need any measuring device to tell me that 100% of all people see GD on the pigment prints and that the dye prints are a lot glossier. Are you claiming that the Epson pigment printers have zero gloss differential? You want me to quantify my observations of what makes a nicer print (I thought I did). On glossy and semi-gloss media, there is absolutely zero gloss differential using dye inks, there is a higher gloss using the dye inks, the colors are "punchier"! Make a print that has a lot of deep blacks using both a pigment and one of the aforementioned dye printers, again, even Stevie Wonder can see the difference.
I looked back at Michael's review of the Epson 2200 from 2002 (9 years ago), he was using matte paper then, however he states, and I quote:
"Oh yes — one more thought. My preference is for matte printing papers, and the 2200 is outstanding with these. But frankly, with glossy papers the 2200 isn't quite as good and one should look at sample prints before making a purchase decision if high gloss papers are your preference."
http://www.luminous-landscape.com/reviews/printers/Epson2200.shtmlMark, even though I have a degree in mathematics from a pretty decent university, I know 1+1=2 and I don't need a calculator to confirm it. Most people need a calculator to confirm 125 x 125 = 15,625, fortunately I don't. Maybe you DO need measuring devices to see a blacker black or gloss differential, I DON'T. A wave crashing against the rocks, a bright sun at sunrise/sunset, white clouds, wedding photography (think white dress) all have GD in the final prints on glossy or luster papers. I'll agree certain papers are less prone to GD, however I'm strictly discussing glossy media. Dye inks make a nicer print. Don't believe me? Make them yourself and you'll come to the same conclusion! As I have stated, even Epson's own sample prints have GD on both glossy and luster paper. Why would Epson ship out prints with GD if their printers didn't have that issue anymore, seems idiotic to me! Maybe the people making the prints didn't see it, yeah that's it, they forgot to measure it first. :-) Now, if you wish to discuss the particular hue of a red or green or blue, sure a measuring device will help, because all people see colors somewhat differently. Gloss, GD and Black seem to be a lot easier to distinguish, at least for me and a lot of "seasoned" professionals I have spoken to over the years!
I've made dozens of prints with an Epson 1280/3880 and Canon I9900 and it's just so easy to see the differences that I am discussing here. Skin tones, no competition, pigment inks. I'm strictly speaking of Glossy media. I wonder why HP would use a GLOP and Epson did on one of their consumer printers? The reason should be obvious to anybody especially a seasoned professional, don't you think? With a dye printer I don't have to tinker with my highlights, they just print with full coverage! Try it, maybe you have forgotten because you haven't used a dye printer in a number of years? I'm a firm believer in perception and when it's at 100% I start believing it's true unless we are watching a prestidigitator!! :-)