The THX certification thing is a little weird. It's good for home movies, but it seriously damages a system's ability to reproduce music well.
In fact, the best home theatre setup I've ever heard didn't have a single THX certified component.
The reason Bose doesn't print it's technical specs is because they would give those who know what they're talking about cold hard facts on which to base their 'Bose really isn't that good' argument.
Now I'm not saying specs mean everything, but they do mean something. The top of the range Bose system would look appalling on paper, a frequency response from 250 Hz - 12 KHz or therabouts, whilst my £160 B&W speakers go from 82 Hz - 20 KHz. The reason is partly because of the 'gap' between the woofer and satellites. The sats can only go down to around 250 Hz before they stop producing sound alltogether, and the gap between this and the sub is so large that it actually registers as a 'drop out' of sound alltogether. All the hifi standards say the measurement is taken from the highest frequency above a certain sound level down to the lowest frequency above a certain sound level. The gap between the sub and the sats actually registers as dropping below this volume level.
Now this kinda makes things look much worse than they are, although it still tells that it's not a technically good system.
Psychoacoustics do play a larger part in speakers than technical accuracy, but with technicalities so completely wrong on Bose systems, they just can't sound very good.
As for printing specs, they could at least print some, such as the maximum SPL (which may sometimes be useful). B&O have never really revealed as much as they could in their specs (although they aren't that bad), but the reason for this is that some of their products look rubbish on paper (and are usually rubbish when actually heard too), but others are astonishingly good on paper, and even better in real life.