To clarify, the “low perf” springs actually advance faster than the “high performance” springs. In stock form on a stock bike, I.e: T3, G5, etc. they start with less advance and add timing faster. Like Jhem states, V7 and the like start advance at 13deg.
I’m probably going to leave this alone for now. Full advance is at 4K rpm and I don’t really use the range below that much. It does take some clutch and extra throttle to get going to avoid lugging in first from a stop.