Hi
No but as I was only into a PCP deal 10 months its complicated, however got the finance at 5.9 apr before the rise which I believe is now 7.9 apr ( or will be shortly). I guess it depends on your circumstances and the deal you hammer out. all deals vary. I got the standard GS in Sept 2016 at 3.9 apr, which will not be available in near future I'm guessing . May be wrong but its a judgement call when you jump in, I guess. Hang on till winter you may get a better deal that at present.
Above all , I suppose it depends on how much you want the shiny new ( red one now shiny) GSA.
Cheers
For what's it worth, the 7.9% may represent a rise on what you got previously, but it's actually a 2% reduction on the 9.9% that has been on the GS and GSA since April. Before this it was 3.9%.
Dealers have percentage leeway in what they are able to offer. Your 5.9% is not therefore the 'old' rate, but a discount on the current rate. I expect that as you were moving off a 10 mth pcp at 3.9% the dealer cut the difference with you.

)