As someone also on the other side of the pond, I can say a large portion of other American fans tend to regard Everton as an afterthought. But, both cities I've lived in as an adult (Buffalo and Philadelphia) have great Everton supporters. It isn't the largest group of supporters (most American fans have only started following clubs in the past 10 years or so and tend to go with those clubs who have seen consistent success more recently), but we are dedicated, know the game, know the club, and we are like family. Side note: Here in Philly, we even have an Everton bar! It feels great to walk in there for any given match and see a crowd in their Everton gear, see Everton memorabilia all over the walls, and do nothing but talk Everton for a few hours.
That said, while my fellow Americans tend to treat Everton as an afterthought or a plucky underdog (in other words, with a disrespect indicative of their shallow engagement with the sport as a whole), the European transplants (mostly Spanish, Italian, and German, over the age of 30) I know have the utmost respect for Everton. Their disdain for clubs like Chelsea (a favorite of 18-year-olds everywhere) is palpable, too.