I read somewhere if one must use wicking grade Loctite in nipples, that should be the "medium strength, removable" 220, instead of 290, which has "medium to high strength" according to the data sheet.
But I have no experience with either of these, I still believe properly designed and built wheels shouldn't need any thread locking stuff.
And I believe a properly designed anything should be fabulous out the box, but these are working, mechanical, advancements that require a more stringent level of maintenance if we want them to perform like new on every ride...
That said, this is not a 40 spoke wheel for a dutch bike and with 1500g carbon clinchers running 16 spokes for a 200lbs man... if a dab of $15 loc-tite is all she needs to keep her going then gosh darn it, a dab of loc-tite she shall receive.
290 is the recommended thread compound from Zipp. Ive put 500 hard miles on them (36Km averages, 57Km sprints) since this post and have not had a hint of trouble since "loc-titing" them.