According to This unofficial FAQ, this was stated in the Fall, 1991 issue of "They", the fan club magazine; it was also noted in the "TMBG Info Club" newsletter, Fall 1994 (archived here).
tmbw.net
According to This unofficial FAQ, this was stated in the Fall, 1991 issue of "They", the fan club magazine; it was also noted in the "TMBG Info Club" newsletter, Fall 1994 (archived here).