I can't say for sure, but I expect all the sympathetic procs work the same way. On my wizard I keep up re-iterate (single cast ... aura sucks with 2 hits only ...) and he has fire and the ice sympathetic procs, so he gets a lot of extra hits. From the log file for a single cast he got:
[Sun Jan 03 20:42:33 2010] Fenagar begins to cast a spell. <Wildmagic Blast Rk. III>
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 9615 points of non-melee damage. <-- Initial spell landing
[Sun Jan 03 20:42:34 2010] A stonefist cenobite is blasted by pure wildmagic.
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 271 points of non-melee damage. <-- Symp proc (cold)
[Sun Jan 03 20:42:34 2010] A stonefist cenobite shudders.
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 4097 points of non-melee damage. <-- Re-it crit
[Sun Jan 03 20:42:34 2010] Fenagar delivers a critical blast! (4097)
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 1389 points of non-melee damage. <-- Second re-it
[Sun Jan 03 20:42:34 2010] A stonefist cenobite is enveloped in recursive energy.
[Sun Jan 03 20:42:34 2010] A stonefist cenobite is enveloped in ethereal energy.
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 1389 points of non-melee damage. <-- Third re-it (lucky round

)
[Sun Jan 03 20:42:34 2010] A stonefist cenobite is enveloped in ethereal energy.
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 5518 points of non-melee damage. <-- Twincast - wildmagic is a random spell, casts 3 possible, so different emote on this to the initial spell landing
[Sun Jan 03 20:42:34 2010] A stonefist cenobite is struck by the claw of Gorenaire.
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 799 points of non-melee damage. <-- Symp proc crit (cold)
[Sun Jan 03 20:42:34 2010] Fenagar delivers a critical blast! (799)
[Sun Jan 03 20:42:34 2010] A stonefist cenobite shudders.
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 1389 points of non-melee damage. <-- Re-it
[Sun Jan 03 20:42:34 2010] A stonefist cenobite is enveloped in ethereal energy.
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 271 points of non-melee damage. <-- Symp proc (cold) ... not sure why this one triggered ... unless it can trigger from a re-it, but I didn't think that was possible
[Sun Jan 03 20:42:34 2010] A stonefist cenobite shudders.
[Sun Jan 03 20:42:34 2010] Fenagar hit a stonefist cenobite for 1389 points of non-melee damage. <-- Second re-it
[Sun Jan 03 20:42:34 2010] A stonefist cenobite is enveloped in ethereal energy.
Shows sympathetic procs and re-iterate from the same spell cast.
Hope this helps with your investigation.