Great! I'm happy you got better performance. Maybe do a couple more tests, you might be able to get a bit more out...
I agree with cdelgadop, the SVC does affect performance in a large way. I don't easily recommend it for customers, except if it's really needed. But then again, you can design your SAN differently...
I'd recommend... SAN Volume Controller: Best Practices and Performance Guidelines
IBM Redbooks | SAN Volume Controller: Best Practices and Performance Guidelines