I'm not surprised at all by Paul's statements. The acts themselves tell us nothing of love, many would give all to the poor just so that others would revere them. Some would surely die for their faith if they were boxed into a corner with no way to save face, and yet love is not evident, while stupidity reigns supreme.
I'm rarely swayed by tales of how much someone is "sacrificing," I've found way too often that it is a sham, or sadly that while it may be true, the person has little capacity for love. While at the same time I know folks who are incredibly loving and you never hear of them performing these great feats. (then again,
Matthew 6 tells us that we should do what we can to avoid notice when we give.)