You're right that ECN traders (of which I was one, in another account) were counting on bailing out onto the fractional NASDAQ quotes. But the ECN traders couldn't lean on me personally: size at the 32nds was huge (e.g., 340,000 @ 9/32 x 430,000 @ 5/16), and if that started disappearing I could pull my Brown order. But I'd get filled on Brown when the size was holding, which was very nice.