I can't help feeling that if the judge had been white and the defendant black, he'd have received more than six years.

Another thing about the proceedings I found most distasteful was Pistorius's charade of staggering about on his stumps in front of the court, presumably to gain pity. As was his vomiting and sobbing etc. If someone has committed murder, no amount of grovelling and playacting should have any influence at all on the judge's decision about sentencing.
One can't imagine the Yorkshire Ripper or Harold Shipman vomiting into a bucket and sobbing loudly in court helping to reduce their sentencing. The crime itself and the guilty verdict are all that matter as a basis for a penalty being set.