The Thor unit is under heavy debate, personally i love this unit

. However i was having a debate with a fellow player over Bnet yesterday. He was talking about the final sequence in the Terran demo at blizzcon. His point was that a well balanced Terran army will be very difficult to counter when playing vs Terran. Personally i thought how so since you have the same units etc. The argument was that once you get Thors in range its gg and this will be the main tactic. I disagree.
This was his imaginary army: Marines x30 Medics x10 Vikings x10 Thors x4 BCs x4 Siege Tanks x8 and a science vessel/nomad. His tactic was to do that same as in that last sequence of the Terran demo. Harass with marines, bcs etc deply Thors ability then siege the base out (almost the same). He honestly believed you could not be beaten in this situation with out having the same army and it would be a battle of Thors for the win
I told him i reckon i could wipe out his force without using Thors and only half his units.
My army: BC x2 (yamato) Ghosts x4 (2x Nuke, 2x Drop pod) Banshee x6 siege tank x4 Vikingsx4
This is my plan

Using the early detection radar you could see the army coming in, quickly sensor sweep showing you what u have to fight. Instantly send your BCs to the side and yamato his Science vessel asap if you can retreat your Bcs ( get energy back at star base) if you can't Force target his Bcs as a distraction. Next bring in you ghosts set a nuke behind his line of advance and one in from of his line so the nukes cover a wide range. At this point his Thors and heavy units are out of range of your base and units but are to slow to be of any use. He has two options continue forwards and loose half his aamy or retreat and do the same. Chances are he will go both ways and hope there is only one nuke, or charge towrads your base, either way he lose. you already have your Siege tanks deployed so anything left over will have to flee, cloaked banshees can mop up any ground units left over. Only threat now is vikings and a couple of Bcs. he cant land his Vikings because banshee and siege so they are no good! His Bcs may be a problem but chances are you will have enough time to counter. The drop pods are used if the nukes don't kill enough. Other wise you can save them for counter/harass.
Nukes seem allot easier to build in SC2 without having to have a command center for everyone. Bring multiple science vessels? Probably the best option, but really just target them asap and take them out first. The key is to move fast get those nukes down. Nukes plus banshee is going to be great.
Even consider this, you place you nukes to close and they can retreat. Cloak banshees swoop in behind and lay waste drop pods down slow there movment. If it was me i would not walk through that kind fire and move another direction, boom nukes lay waste.
Terran detector towers cant attack anymore! So it will be harder to push the map as banshees are the number one counter for this. Fast/high damage and cloak.
I am sure there is a better way?
and what so scary about a THOR, they are slow big and easy to kill!?