That's what glass.net informs the public on it's website. I also plugged in multiple zip codes from all over the country for a quote on a DW1341 and got the exact same 3 quotes every time. At least they weren't low-balls.

QUOTE FROM THEIR WEBSITE:
Auto glass is not a product - it's a safety feature.
Many people only look for the lowest price when they shop for auto glass.
But there varying qualities of glass, and levels of installation quality.
Windshield installation quality is affected by these 6 factors:
Glass Quality
Windshield glass is laminated - a piece of vinyl sandwiched between two pieces of tempered glass. A good windshield matches your old windshield exactly - tint, exact size, and extra features such as a rain sensor. Cheap installations often use badly-fitting glass.

I just went there to get some quotes,,, way too funny! Tried the 05 saab like in agrr article way cheap! then went to a basic dw1341 and that was higher!!! what was real cute is put in zip code, They came up with shops that don't exist in my area. One was windshieldsmith, called the number and it was 89glass! The prices in there must be just like the prices reported by agrr on page 24 ,,, no installation, no labor, no kit, no tax, must be quote on glass only!!!! all the more reason shops need to RAISE their prices, this is just NUTS!