mgoetze, on 2013-January-22, 11:38, said:
I guess that is standard. With my regular partner, though, it is a GF+ hand with 5+ (probably 6+) minor, but not necessarily a major at all. (A direct 3m bid over 1N is invitational.) So our 2♣ response certainly doesn't promise a major.
Despite this, however, if the Stayman bidder follows up with 2N (or 3N) then the bid does indeed promise (or at least show) 4M, so in the sense in which it is normally used here I would regard our Stayman as "promissary".