Just pluged on a Asus PIII,800Mhz,USB1.1,Win XP-SP3,direct on USB Port and later by a USB Extension Cable(active repeater) and I get the same strange delay and reaction.Maybe is something the way Windows manage USB Audio Devices? And how's that V4.00 works well (pretty well).
I couldn't get Dell, P2 working yet, with Win98 installed and old USB 1.0 port, but I'm working on it.