I'm amused at the people laughing. Katy's numbers are an improvement over her last two albums. And to be quite blunt, she had more singles go #1 last era than some artists have had their entire career, so keep it cute.
She solds MILLIONS of singles, including one already with Prism. Her label said this is a marathon, not a sprint. Opening up at over 275K is a major deal in this age of music. And most artists would rather have longevity than front loaded sales anyway.