@Hurrian - damn it, that just does not make sense:

my revision 2204 efuse values:
009ab9e5
009a86ac
00aab48a
00aba2e6
00ab90d3

my revision 2101 efuse values:
009ab1dd
009a81a6
00aab48a
00aba2e6
00ab90d3

your efuse values:
009ad0fe
009a94bc
00aab48a
00aba2e6
00ab90d3

Starts to look like SR is not calibrated for 500,550 and 600. WTF?

Lets wait someone else to post efuse calibration so a definite conclusion could be made.