Thanks HKJ! Stupid me - didn't see you actually list the calculated internal resistance for each battery tested on that last line! The batteries I'm looking at are the Pana PD's, Pana CH's, Samsung INR's, Sanyo UR18650FM 2600, - think the AW IMR 2000's are out of the running. Like the tests you did for the AW IMR's, the 1600 (0.05 ohms) were lower resistance than the 2000's (0.09 ohms) - think the same is going on with the Samsung INR 1500's vs 2000's.
But of course I wish you had test results on the Pana PD 2900's and Pana CH 2250's, then could really see what's going on in this current field (still reasonably prices batts somewhat). The Pana PD's are of course a great option with their apparent low resistance, 2900 mAh runtimes, and relative low cost ($16/pair at FT).
So, looks like the Samsung INR 2000 is the lowest resistance battery you tested at 0.04 ohms - chart says here: http://lygte-info.dk/review/batteries2012/Common18650Summary%20UK.html, interesting... If you were to test the Samsung INR 1500, I think you'll find a new record.
Ohh! Thanks by the way for all this crazy work involved in this testing!! I know it's a lot of time and cost I'm sure!!