Yes the partner shipping is usually as fast as prime. I was told that the devices would be here no later than Sept. 9th... and they came in the mail today from a Wednesday order. If I buy from Amazon directly as I did with the solder suckers.When I go to an 'affiliate'store then the store rules are in force...
I never usually do that... the difference in cost (savings?) is eaten up by the shipping charges from the 'Affiliate' store and or the shipping time. My feeling is that the usual small change saved isn't worth giving up the Amazon guarantee.
Doc