According to the DSII wiki, as of Patch 1.04 Calibration 1.08, the various weapons have the following parry properties (graphic courtesy of TheHolyChicken86):

However, others have noted that this information might be out of date because of recent patches. In this thread, users noted that the graphic implies that the target shield (type: parry small shield) has the same parry setup time as the watcher's shield (type: fast small shield) which doesn't seem to be the case. In fact, parry small shields in general appear to have longer setup time.
Has parrying been affected by recent patches?
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