Just took my Grade 8 piano this morning (a special visit examination, hence outside the normal dates).
So nervous I could hardly play, made worse when he asked me two scales (two! well, one scale and one arpeggio) not on the syllabus, one of which I made a complete hash of. Also made at least one fluff in each of the pieces. And the piano was so "bright" it was almost a honky-tonk - the hammer felts must be all but down to the wood.
On the plus side, did 90% of the scales & arpeggios near perfectly, didn't stop in any of the pieces even when fluffed, brought out the main theme at each place in the Fugue and got the articulation, dynamics and interpretation just the way I wanted (fluffs apart). The sight reading went really well and the aural tests were OK: full marks for sight singing and modulations at least.
Overall I'm absolutely certain I've passed and passed well: I suspect that the distinction I was hoping for went West with the scales!!
Results in 3 weeks (ish).