I've not seen a sniff of these outside remnants at TRU and remnants at K-Mart... once each.
In my estimation, TBS 3.75" is nowhere to be found... It's not even being distributed at most Target stores, TRU's the only one to get much in, WM is hit and miss (at best) nationally much less localized (nothing here, yet), and K-mart's getting a case or two in, that's it... some, not at all yet.
TBS 6" seems like it's doing ok, though Maul, Luke, and R2 are findable... I see them anyway in my little localized area. Sandtroopers sell steadily. I think hype's part of this, personally. But the line seems to be doing ok out of the gate.
Legends and Mission Series, I see everywhere... Wal-Mart, K-Mart, Target, and Toys R Us all have these in abundance... If I were to point to pegwarmers, it'd be these, out of the gate. Only Yoda seems difficult to find if you can give that label to any figure. I thought Vader/Droid might be a tough nut to crack, but no... He's everywhere in abundance. These are the only heavily distributed action figures from Hasbro so far this year, and it seems to be national not local, so I think that can get some finger pointing...
TBS, either size, I agree for now... Way too early. I've barely seen anything of 3.75" and 6" I think really hasn't seen full distro yet either... better than that 3.75" line though... yikes. It's a shoddy assortment though, and shoddy carry-overs as well IMO. I think Hasbro's going with what was produced though, not what maybe was the best choices... I think a lot of Wave 1 was already in the wings for AOTC3D and just got put on new cards, more or less.