In reply to DaveHK:
I presumed he meant descend TG to get to the bottom of the buttress, if so walking to the top via the pony track may well be tedious but is quicker, i have done this numerous times, on one occasion we stormed to the top and down the gully thinking yes first on the route, only to find a team including Chris Bonington (with film crew) abbing in to the second pitch, they had helicoptered in!
"I'm doing Gardyloo buttress" will invariably mean by the line of least resistance, Smiths route by the variation i would have thought. Other good news is that it should be in by then.