Hmm, not sure what to think about this one. Apple are technically correct when they say the new iPad has 4G, but should they really be advertising it as such in the UK? As far as I am aware, even once LTE becomes available here the chipset used isn’t compatible with any of the frequencies planned to be used for LTE here.
While you may argue that Apple are fine advertising it as 4G, I don’t think that Vodafone have any excuse for doing so. Surely that can only lead to the assumption that an iPad purchased through Vodafone will be using a 4G network? They do run the network, after all. I wouldn’t expect Vodafone to sell me a 4G phone and then not have any network at all to support it.
Hopefully this isn’t the start of a downward spiral. Three already tried to palm HSPA+ as 4G (since edited) and then had to backtrack quickly. If networks start to advertise 4G devices without having a 4G network then things can only get messy.