Yes, on very heavy submission days, I've had the item delay showing-up in Category too.
No PAIN, No GAIN.
I've been listing books on Monday evening to avoid the weekend CRUSH. Mine usually index and cat. in a few hours on an off night. Actually, I've had pretty good sales on that basis too with a few bidding wars that really took me by surprise. I like the theory of list on Monday and the weekend browsers see my stuff all through the week and the next weekend for max exposure. Sat and Sun just seem to be a crunch with only bargain hunters for bidders.
Danno
Edit: I also sometimes do 10 day listing on Friday to get 2 full weekends of browsers and a finish on the Monday. That works too; especially to get a flock to follow my auctions from week to week. Now I get alot of repeat customers.