As a reference, I have a set of Lynx Black Cats that I have the lie angles dialed in on (62 deg for the 5 iron through 64 for the 9 and the PW 64.5 with 1/2 deg between clubs). These just so happen to match the lie angle measurements on the spec sheet for DCI.
I have a set 4-GW. I use the 6-GW since I carry a 5H. They all hit perfectly straight and clean. A side by side eyeball check (with the clubs on the center of the sole) shows the lie angles match the Black Cats perfectly and there is 1/2 degree separation between the irons.
I go to the repair shop at Golf Mart and they show that my 6 iron is 59 deg and 9 iron is 61. This is 2 degrees flat. A check with a png Eye 2 green dot 6 irons showed a 2 degree diff between the 6 irons and a 4 degree diff between the 9 irons. I also had my 7-9 irons adjusted 1/2 degree more upright because the 6 and 7 appeared to have the same lie angle and the 9 iron appeared a degree flat vs the PW (a guesstimate of a degree is half the width of the butt of a golf grip).
I also went to Golf Galaxy and they stated all my irons are 1 1/2 degrees flat.
I find this impossible to believe that the irons could be that far off from standard, given that I am 6'1" with a WTF of 35" (and should be 1 -1.5 deg upright). I had previous experience with ill fitting clubs and I cannot hit a club that is 1 1/2 - 2 degrees flat (with the Black Cat the 6 iron was initially measured at 61 deg and when I had it bent to 62.5, I could hit it properly). Even with my Snake Eyes irons, my 7 iron had to be 63 deg and my 8 iron was 63.5.
I have a feeling the fitters are affixing the irons into the bending machine with the hosel touching the flat surface instead of the center of the sole. Am I correct?