Piling on to the boredom,
We went last night for a quick dinner (around 6, just about when Mike G and his family were finishing up, if I spied him correctly from across the way) and had yet another fabulous meal. I think they have really hit their crust stride; it's been just perfect on our last several visits, at least for our tastes. The stuff they're puttin' on the crust ain't bad either.
Tried their basic marinara pizza for the first time and since it hasn't been commented on yet, just wanted to note that I found it very tasty. Marinara, olive oil, basil, and garlic. It's one of their few, if not the only, pizze with garlic and the flavors were great. A touch on the sweet side as one would expect from a marinara, but nice balance. At 8.50, and lacking cheese, it's a good option for cheaper, lactose-free fare, should anyone be craving such a thing while at Spacca Napoli. And a good option if you're saving room to finish, say, your dining companion's heartier funghi e salsiccia pizza.
Ramon, to touch on your question about the crowds, last night around 6 there was no wait for a party of 2. Seemed to be about 75% full. Maybe a touch more. Based on our experience, I'd say you're better off going earlier than later. We've tried going at 8:30 or later on a Thursday, Friday, Saturday, and Sunday and encountered substantial waits on all four days.
Oh, and lunch never seems excessively crowded, based on the handful of times we've passed by.