“Wang debuted like a shot of espresso. She donned a sizzling bedazzled red romper and glittering Louboutin stilettos. Style and spectacle are basically Wang’s calling cards, and her outfit radiated fearlessness and ferocity. Rachmaninoff’s third piano concerto, like all concertos, unfolds in three parts. “Allegro ma non tanto,“ the first section, begins deceptively straightforward as the pianist introduces a simple diatonic melody. As the section and concerto progress, however, the …