Those same questions came to myself a few years ago when the Tate St.Ives was built. It is the gallery which brings the question, 'is the gallery the art' This Gallery built on the sea front, where the British art scene existed in the early 20th century, it was primarily built to celebrate these artists, that alone makes a big statement about the gallery. Then a celebrated architect, manages to create structure which not only initially but even today many years later is talked about more than the art inside.
I think this is a bit of a tangent off from what you're saying Rob , yet in the same, asks questions, viable ones about art galleries. They are of course often filled with mediocre work not helping, or maybe justifying the inquiring mind.
Good sequence in the blog and good pics.