] It really struck me as I reread this first section how rigidly Marianne--and her mother--seem to have classified all people into basically two categories: those with and without strong feelings.

Perhaps because of the extreme nature of her feelings, Mrs. Dashwood jumps to conclusions regarding the outcome of Elinor and Edward's relationship.

"It was enough for her that he appeared to be amiable, that he loved her daughter, and that Elinor returned the partiality. It was contrary to every doctrine of hers, that difference of fortune should keep any couple asunder who were attracted by resemblance of disposition; ..."

"In a few months, my dear Marianne," said she, "Elinor will in all probability be settled for life. .."

It was a done deal, in her estimation. What is surprising is that she should so completely discount their own "difference of fortune". But that is because she is of the "sensibility" type, and all roadblocks to the union are not part of her thinking. Isn't this particularly unusual in these times? Times when so much stress was placed on what finances the woman came with? I guess not - if you are like Mom and Marianne.