Ch. 3 - "but we must allow for difference of taste. Elinor has not my feelings, and therefore she may overlook it,"

While it may be true that Elinor would overlook the superficiality of not being animated by Cowper. She shows how incredibly self-centered she is by being oblivious to the fact that Elinor is a deep feeling person. She's so self-absorbed that she can't even fathom a person more reserved than herself, (which is probably 99.95% of the population), is capable of having any feelings whatsoever.