I agree, Kathi, while W was good-looking, gentleman-like in appearance, and honest in all his looks, his behavior was far from gentleman-like. To spill such a story to a virtual stranger practically the moment they met is odd to say the least. However, Lizzy is blind to this due in part to the fact that what W says just backs up her own perception (prejudice against) of D, but also because he's hooked her already. She's enthralled and can think of nothing but W.