Info on Sony Xperia Tablet Z. It is not abgn WiFi

I have the Xperia Tablet Z WiFi 32Gb model. Now the Tablet is OK but it is not abgn WiFi even so it says so in its spec sheet which came with the device. It is bgn, that is it. Me and loads of buyers complained on the Sony support site forum. Guess what... Sony does not even bother to answer. Honestly while the tablet is fast for an Android tablet, it is not the lag free experience you get on the HTC One. It is a typical Sony Android device, I hope HTC will release a nice Tablet based on the One latter this year, because at least they supply firmware and software updates.