Yes they do, but more so. I happen to use Peco switches, but the basic premise applies to any switch. First, I use a very fine piece of copper wire soldered from the (movable) point, to the fixed part of the point, then to the outside rail (obviously soldering on the non-wheel side of each rail). This ensures that all parts of the point rails are powered at all times, not reliant on the pivot or the points touching the outer rails. So you can weather the rails as much as you like without worrying about contacts. I use a jeweller's saw to cut both point rails right through just before they come together. This means that there's no chance of a short with a slightly out-of-gauge wheelset where the two point rails come right together. I make sure that all the guard rails are electrically isolated from the frog and everything else (Peco switches come with these connected, but they can be easily disconnected). Then I install the turnout, with conductive joiners on the outer rails (both ends) and insulated joiners on the inner rails (to the frog).
The whole turnout is now powered from the outer rails it's connected to, except for the frog. Once installed, it's easy to drill a fine hole right next to and inside the corner of the frog, then solder a wire to the frog and post it down the hole. This wire is connected to the Tortoise to provide frog power of the appropriate gender.
Another trick with DCC -- use blocks on your power supply (it's fairly cheap to buy a four-way isolator), which means that each block is powered independently and a short in one area won't stop operations in another area. I have my mainline as a block, main yard as another, and other bits and pieces of sidings and small yards as a third block. Then, crucially, I have all switch power as a fourth block. The power to the Tortoise does *not* come directly from the rails, it comes from the fourth block bus that runs round the entire layout. The power that it switches (to the frog) *does* come from the track. The nice thing about tortoises is that you don't have use the same power supply for the switching that you are using on the track...
And the reason? Well, if you're anything like me you'll keep driving trains the wrong way into points. With the track wired this way, your yard will short and a beep will sound, but all the other trains will keep running (so your fellow operators might not notice you screwed up!). And, of course, your DCC-controlled turnout can still be operated (because you shorted out your track block, *not* the block that's operating the Tortoises). So what happens is that your train stops (without derailing), you go "D'Oh, turnout not set right", set the turnout from your controller, and as soon as it's changed the train just carries on as if nothing had happened. Fantastic...
Charles