Mummer,
I don't have a teardrop but I looked hard at them last year before I ended up with my Aliner Expedition. The dealer I shopped at outside of metro Atlanta carried both Aliners and T@bs (the cost is similar). I was open to owning a T@b and was wanting to see what they were really like.
I traded in a traditional heavy popup with two slideout bunks and a slideout dinette and wanted something that was more 4-season campable with minimal cold weather assistance plus easier to set up by myself. Also I have only 1 child left at home and we will soon be empty nesters but I had to, like you, consider a smaller trailer for three people in the short term (in our case). Like you I had also tent camped quite a bit.
I looked at both the Clam Shell T@b with the kitchen in the back and other T@bs with internal kitchens. To answer your direct question, T@b does say on its website that they can sleep 2 or 3 people depending on the model (on their website click the "About Us" link then the "Teardrop History" and it's in the 3rd paragraph). However, their individual models don't list "sleeps 2" or "sleeps 3". Their Q, S, and U models all claim to have a 70x73 inch bed arrangement (folding down the dinette table) while the CS and CS-S all claim to have a 70x58 inch bed arrangement. So I would think the bigger bed is for three people and the smaller bed for two people.
Having said that, though, putting 3 adult sized folks in a 70x73 bed is a tight fit. I'm 5-11 inches tall and 70 inches is not long enough to lay straight. A little sideways might work but not with 3 people. The smaller bed for 2 leaves more elbow room but again it's a short bed.Also the ceiling is 5-9 inches high in all T@b models and when I went into them they were claustrophobic and I had to bend over slightly all the time while inside. By comparison, my Aliner back sofa folds down into a 60x80 inch bed for 2 people and the front dinette folds down to 40x80 for 1 person. I could stand up regularly in all walking space inside the Aliner.
With the fold down dinette sleeping arrangement of the T@b, when 1 person wants to go to bed, there's no room for anything else. And if it's cold, raining, and/or you are spending time inside for some reason, it's tight. At least with my Aliner since the bedding is split into 2 locations, someone can sit up and keep reading or computing or watching tv in one location while the sleepers can set up and turn in.
But the T@b does have a huge "cute" factor and my Aliner has something of a "cool" factor. The T@b is easy to push around by hand and not heavy from a towing perspective. There are people out there that love them and work around the lesser points but they are couples that I know and not families of three.
Don't know if I helped much. I had admired the T@bs but had never been in one till I had the chance on the dealer lot.
Also with your three people (DD according to your signature) will it be long before she goes off to school and there are two of you possibly in a T@b? You might be willing to put up with some tight spaces for a short time and think more long term with a T@b when there are just two of you.
Bama Ed
PS - is there a T@b dealer near you where you could look at them in person and go inside?