Not sure how to measure input lag, but I think your bt dongles are fine.
Remember that lag increases exponentialy on this dongles as soon as you move more than 1 meter away. And if your dongle connect direct to the usb port with no extension cable, it can get worst because pc EMI field.
-data and + data are just fine in the picture, some user said it was wrong, maybe his cable got wrong color code.
BTW I made two adapters, one with wml43 and one j27h002 and can´t notice any difference, they work pretty much the same. The antenna design is different, wml is more rounded, but didnt notice any gain or loss between both adapters.
Remember that lag increases exponentialy on this dongles as soon as you move more than 1 meter away. And if your dongle connect direct to the usb port with no extension cable, it can get worst because pc EMI field.
-data and + data are just fine in the picture, some user said it was wrong, maybe his cable got wrong color code.
BTW I made two adapters, one with wml43 and one j27h002 and can´t notice any difference, they work pretty much the same. The antenna design is different, wml is more rounded, but didnt notice any gain or loss between both adapters.