...the sending and receiving sides of the ADSL signal are modulated above baseband...
My argument here is that the ASDL signals are sent at a frequency higher than the voice traffic, not the baseband, since ADSL does not have a baseband. The use of the word "baseband" implies that ADSL data is analog, and it is not. It is digital. Yes, it's a nit-picky argument, but I clarified that the reason for this is because the original article (if you can call it that) was a rant about people using technically incorrect terminology.
10BASE-T is BASEband on the wire
OK, now you're referring to the IEEE 802.3 medium naming convention, which differentiates between "baseband" and "broadband," "baseband" meaning only one signal is sent at a time, whereas "broadband" means channelization is used to send multiple signals at once. ADSL over phonelines would therefore be "broadband," since there is definitely channelization going on, making the use of the term "baseband" still inappropriate.
"If you want to know what happens to you when you die, go look at some dead stuff." -- Dave Enyeart