Actually we are. While Pentacostals are the fastest growing denomination in all of Christiandom (protestant and Catholic), Reformed theology is growing very rapidly among Baptists as well as among constervative presbyterians and other non-denominatoinal churches. It has had a majaor rebirth and is taking off. It is the protestant branches which are Pelagian like the Catholics which are dying out.
Sigh... The Church is not Pelagian — we battled it, remember? By deviating to the other extreme in antithesis, the Calvinist lead to their own heresy, just as Nestorius deviated too much to the other extreme in his battle against Arius.