I was just listening to a podcast from Pampered Penny (sorry, it's on an 18+ site so I can't link to it) in which she said that, perhaps surprisingly, DLs seem to be less-specific over their choice of diaper brand/type than ABs.
She suggested (and I've paraphrased this a lot) that this might be because DLs enjoy the "kid in a sweetshop" mentality of seeing a huge range of obscure diapers to feed their curiosity, whilst for ABs, diapers are more about safety, security and certainty, so they like to know what to expect and want diapers to be reassuring and familiar, rather than new and exciting.
The line between AB and DL is probably quite blurred for many people, but I thought it was an interesting theory, and I'd love to put it to the test here. So please vote now!
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Oh bugger. Sorry for the bad grammar in the "DL" options above... Got a bit trigger happy with cut & paste...