I recall reading that poplar was a common wood used in guitar laminates. But I don't remember if that was Taylor using poplar, or if it was other makes.
FWIW, I don't think it makes much difference. I have not had much experience with the 100/200 guitars, but I can tell you first hand that when I had my 210, I could not hear a difference between it and a 110. The chief draw with laminates is cost and stability (resistance to humidity changes). But that latter point is to be taken with great caution since a solid top is just as likely to suffer from RH neglect, so lam back and sides can give an owner a false sense of security if one is brazen about guitar care.
Edward