I'm also in the camp of keeping my leaders short enough to not have to cast my connecting knot through a guide.
While the Alberto knot, among others, is certainly a good choice for joining lines, any knot, regardless how small it may be, is still going to act as a tire hitting a speed bump to some extent when it makes contact with a guide while casting.
That's just been my experiance, others MMV.
Sorry, not trying to Jack this thread.
This may be a topic for an entirely new thread.