If your Yokohama's lasted you about 10,000kms and were really soft, then that would explain it.
Well it should last your more then 10,000kms, but I assume your tyres where on the way out, at the time.
Soft tyres are best for grip but have bugger all lasting time.
Hard tyres will last longer but for them to grip, they will need to warmed up, but soft tyres will still be better for grip.
Did you track your Yokohama's?
Or were they already on the car and running low on tread..?
Decent performance tyres for street cars should last about 2 years avg.
I had Yokohama ADVAN's, nice tyres but were getting low on tread then I went Kumho ECSTA's.