Spekesoftly,
We do occasionally get SID's, but you are right in that, more often than not it is a "local" clearance and because of the speeds we fly at, getting us out of the way so that we do not clog up the system is the main priority. Having said all that; the clearance may still be fairly complex and as such will need to be written down. But again I ask, please do not give me a taxi clearance at DA / MDA, it's a very critical stage of flight and something will get missed.
As I said earlier I will be running a number of courses later this year and on into next, and will be inviting our local based controllers along for a look see and a chat and I will report back.