When I finish my pull I've been backing off entirely which lets me drop to the rear pretty easily. Of course, it then requires a little surge to get my speed up to that of the pack, but that's not too bad if I time it well.
The biggest difference that I noticed compared to our team is that when it is time to pull the next rider is right there at the lead within a few seconds. That acceleration is missing in our TTT, which means that the current leader ends up riding for some extra seconds waiting for his replacement. Sometimes the replacement doesn't get there for quite some time. That's probably part of the reason why we do 1 minute pulls instead of 30 seconds like you guys.