Flew out to see Xscape, SWV and Bell Biv Devoe last year and I wasn't really expecting to enjoy SWVs performance, but she actually impressed me for sure. These YouTube clips of the live performances don't really do many of these singers justice. All of the singers really killed their performances that night. I'd rate her a 8 if her live performances were more consistent; although I didn't hear inconsistencies live, sometimes her delivery comes off more like half-singing/half-talking instead of actual singing. It's something that I've noticed with many highly-respected singers at times, but when taking everything into consideration, 7.
I know this thread isn't about them, but those Xscape girls are all the truth.