I think it really depends on your local office and under what rule you applied for. For example, my local office received fewer applications in Q3 than in Q2 and has fewer pending applications. However, it might take me longer to receive an interview date because I was an early filler under the 3-year rule, whereas they will process a case faster for someone who applied and is already eligible to take the oath.
But it's all my guess based on what I think makes sense lol