He addressed it on his website, which no longer exists (at least not with the same URL) but can still be seen using the Wayback Machine here.
A forum poster named ChrisW made a long list of similarities between Wheel of Time and Night Angel, to which Brent Weeks replied as follows:
I feel like there’s the question you’re asking--which has many parts, but is fairly simple--and then a raft of assumptions behind the question that you may or may not hold, but that I’m leery of.
So, first to take your questions at face value: are there similarities? Sure. Jordan was a favorite of mine. I didn’t love everything he did, and I haven’t read any of his books for eight (?) years, but those first books wowed me as much as Tolkien's books did. Jordan rocks.
He goes on to describe how many of the common elements in the two series were both based on the same inspiration - whether that be from real-world history, myths and legends, or other fantasy works such as Tolkien's - rather than NA being a ripoff of WoT.
When you’re talking about elements of stories that get repeated, and whether they’re rip-offs, you have to decide how specific or general you’re going to be. In the Night Angel Trilogy, Kylar’s an orphan. Wait, not just an orphan, a poor orphan. (Oh, rip-off of Charles Dickens.) Wait, not just an orphan, an orphan who can use magic. (Oh, rip-off of Harry Potter.) Wait, not just an orphan, an orphan who’s smart. (Rip-off of Orson Card.) Wait, not just an orphan, an orphan whose master teaches him to fight. (Rip-off of Star Wars…or whatever.)
Or maybe there’s just something intriguing about orphans. Orphans face an amplified form of the same question that bothers all of us as we grow up: who am I? Where did I come from? Who are my people, and how much does that matter? Plus, orphans are underdogs, so it’s easier to care about them.
He does admit that the part about women, men, and their use of magic is too similar:
I’m not going to go through them all your examples because of space. Some are really pretty different, or conversely quite common to the genre. The one that IS quite similar is that the women have a unified school and the men don’t. I’d do that differently if I had it to do again. It’s not essential to my world and it IS too similar. My bad.
And he concludes by saying that regardless of whether all the ideas are original (hint: they aren't), he did at least put his own personal spin on them:
Those guys each have a couple of decades of writing experience on me, so if you think they do it better than I do, that's fine. My work is definitely influenced by them, and it's influenced by Tolkien, and it's influenced by a bunch of other writers both famous and gifted and not-so-much. At the end of the day, I think if you tore off the cover and read any of my books without seeing who wrote it, you wouldn't say "Hmm, seems like a pale Robert Jordan. Maybe something from early in his career?" I think you'd say, "That's a Brent Weeks book. Definitely."
His full post was too long to quote here, but it was an interesting read and says a lot about fantasy.
Whether Weeks was telling the truth here, or simply waffling to cover up the fact that he did rip off Jordan, is up for debate. But your question was whether he's talked about it, not whether he copied from WoT.
I found this by searching Google for
brent weeks wheel of time, which led me to this forum thread, with a link to this page which no longer exists. It then took me ages, even using the Wayback Machine, to find a copy of that page, but eventually I managed it using this list.