Speaking about a particular joseki like
often wrote:after white makes he extension he gets a decent amount of territory while black is relatively overconcentrated and w/o much territory.
means to ignore the fundamentals: what are the amounts of territory, how do the influences compare, why is good connection and eye shape (not) called overconcentrated?
SmoothOper wrote:I guess I would expect the selection of most joseki would be left to the student to solve
A teacher can / should be able to provide a selection if the student wants to learn it from the teacher.
often wrote:a "professional teacher" would know the recent happenings with go knowledge
Some teachers like to keep up with every recent fashion. Other teachers improve their knowledge without having to follow every fashion. Either way can be very time-consuming, so every teacher has to make some compromises, because he cannot have enough time to follow both approaches equally exhaustive.
i've read some joseki dictionaries and they don't really mention if something is "old"
Then you read the wrong dictionaries. (Some dictionaries simply teach mainly the new. If so, they should mention when exceptionally some variation is old.)
doesn't reference that its old
The particular joseki is not "old" in the sense of "outdated", but nowadays also newer, alternative variations and lines of reasoning have been developed. (And there are the territory fundamentalists, who compare only the territory.)
oren wrote:The problem being is no book covers all joseki that are played and especially true for newly played joseki.
No problem either. The reader must learn to develop his understanding from representative selections. (It is HIS problem if he does not do this, or even fails to acquire knowledge necessary for knowing how to do it. It is not the DICTIONARY'S fault.)
If my teacher doesn't know, he'll give me his best opinion. That's all I ask for.
I would ask for more from the teacher than just opinion. If he doesn't know all josekis by heart, he must be able to explain how to understand by reasons and compare variations.