I agree with Chandra that Jane doesn't seem to be in love at this point. But I do think that her propensity to like people and to give them the benefit of the doubt can lead a gal to heartache. This is especially true when they know so little about the man. Who among the Bennets' longterm acquaintance has known Bingley for any length of time?

Just to make myself clear, I don't suspect Bingley of anything. But his admitted trend toward haste and her mother's spring-into-matchmaking-action attitude make me uncomfortable for Jane. Jane's nature, I must agree, only compounds this concern.