Many Calvinists that I know are intellectually rigorous in their theology and deeply sincere in their faith. I have found, however, that many of them have simply not been exposed to catholic (Orthodox, Roman Catholic or Anglo-Catholic) theology but instead have been fed only a caricature of the same. I have seen a number of them move away from reformed theology several years after their reading lists have been expanded. I expect the same will occur for a subset of the reformed theology gang on FR who sincerely debate on these threads.
That said, I stand very firmly grounded in the doctrines of the Reformed faith and it is equally irritating when I see others condemn something they clearly do not have a firm grasp of. Such is the case with some of the comments in the original article and in some of the responses following.