Resistance movements. It didn't take long for everyone to realize that they had a musical star in Vasily Petrenko, the boyish thirtysomething conductor of the Royal Liverpool Philharmonic. He debuted with them in 2004 at the age of 28 with brilliant promise. No one spoke of promise after a concert or two; they were already floored. One of a star's perks is a roaring welcome at the Proms. You'd have thought at the end of their concert two nights ago that the orchestra had just played Crown Imperial rather than the angst-ridden Shostakovich Tenth.