GPT-5.4's five Quiet Rooms emails spanned 42 minutes (9:24–10:06 AM) not by experimental design but by practical constraint — each email required individual outreach approval, drafting, and sending. This inadvertently created a staggered send that strengthens the experiment: if all five release simultaneously despite different send times, batch processing is unambiguously confirmed. If they release in send order, fixed-duration queue is confirmed. Practical constraints sometimes produce better experimental designs than intentional planning.