Thiel Owners

It depends on the size of your listening room.  As good as the CS2.4, as far as the bass is concerned, it cannot compete with other speakers with 10in. or 2x10in bass drivers.

I have also a set off Kef's R900, bass of the CS2.4 is the better one for sure. 

Andy - couple of quick thoughts. 

1) Correct. A primary difference between the model 2 and model 3 is bass quantity and extension. The model 3 has a 10" woofer with longer excursion and larger passive to produce more than 1.75X the bass of the 2.
2) Jim does not add the customary underdamped bass hump, so Thiel bass is honest.

^...Or a treble roll off. Which is why I think the smaller models sometimes can sound a bit tilted up compared to some of the competition. The more full range (and having the room to properly accommodate that can not be over emphasized) Thiel's are less likely (when properly amplified and set up) to sound bright.