Not quite You generate a normal block, then use your trust account to mine a trusted block right after it (especially easy since it's a minimal difficulty computation). If someone else had beat you to the punch on the normal block it doesn't matter the chain with the trusted block is the longest one. So while the trusted block itself costs you coins it gives you a veto over the identity of the generator of the prior block.
I was wonder about this too. I asked CH in an earlier post but I think that section of the post got derailed.
I seems implausible that they would go to all the trouble of adding in interleaving blocks (What I called a vector clock) without realizing they could be used in fork detection. Basically this would supplement or override "the longest chain" rule in cases where a long fork appears out of the blue. Otherwise, anyone who could isolate a single trusted peer could run wild.
However, I didn't think it was plausible to invent ten 1.2 MSC accounts to make interleave feature work either.
trusted node. So I guess if someone manages to grab more coin than anyone else they'll be in charge?