on second thought, spoke tension affecting cup-and-cone hubs makes almost no sense. extremely unlikely because those hubs are almost always aluminum with steel cups pressed into them. never a bad idea to recheck something like that, but the effect should be minimal. I was thinking of spoke tension affecting some sealed bearing hubs. there were documented issued with some Zipp and G-Sport hubs at one time, but it may have been a fluke.
definitely a good idea to take tension provided by the QR or thru axle into account when you adjust hubs, as the inward pressure will add just a bit of pressure to the preload.