I recently received my T1s, also ordered from Boots (I used the Belfast store). Mine were ordered mid-November (I think the audiologist appointment was November 13) and took a little over 3 weeks, arriving on December 7. Sadly my order got messed up and I received the T1 Classic, i.e. the now-defunct monitor which comes without a replaceable cable.
I questioned ACS on what had gone wrong. Apparently Boots, Belfast used an old ACS order form and ACS simply made a set of the T1 Classic as Boots requested. They got me to immediately send back the incorrect monitors (which I did on December 11) for a rush replacement, scheduled to take 1 week. Fair play to ACS for taking ownership of the problem and not bouncing me back to Boots. That said, it's incredibly frustrating to wait 3 weeks, get one's new toy, then lose it again very shortly after it arrives. I did get to use them over the weekend though and they sounded pretty sweet, so I can't wait to get the new ones back!
Will post an update when I do get them.
That would be so hard to send them back even to get the right ones!