I don’t think anyone is offended if that is someone’s opinion; it’s not contrasting with another “school” as worse or inferior and certainly she is doing a wonderful job interpreting Russian music.
I think it depends on your background. For most Americans, Isabeau screams “Sasha Cohen”. Every time I see her, she channels Sasha C. more and more. Exquisite positions held long enough for the spectator to enjoy and respect. The spiral.
And that is no disrespect to Isabeau’s own abilities. But the resemblance is uncanny.