You are correct. Only the method profiler is sampling based, the other metrics are "real" metrics. The only caveat is that we throw away things that are shorter than a certain threshold. For example, in the default settings all I/O events shorter than 20ms are discarded.
Thanks Staffan, for confirming it. Sure, I understand "threshold" part, and found it configurable in "Start FR wizard", where File I/O or Socket I/O threshold can be configured. Thanks!