Though Bernard describes Hogg as a woman of "unfailing politeness", the biographer suggests the philanthropist was not without adversaries. For instance, at a concert arranged by the Houston Symphony for her 90th birthday featuring the elderly pianist Arthur Rubinstein, he characterized her as a "tiresome old woman". Hogg, in turn, regarded the musician as "a pompous old man". By contrast, Hogg said of Vladimir Horowitz, whom she met backstage at a 1975 concert in Houston, "Such a nice man. Not at all like that Mr. Rubinstein."