Okay, after playing a tournament I can state that range can be a real issue for salamander alpha-strike list. As I mentioned in another thread, Tzeentch counters it well. 12x salamanders are still not enough to kill horros fast and they can easily screen heroes by setting them up more than 3" from the chaff. This can be a problem, if your opponent also has a good range, which is true for tzeentch and, probably for CoS - still haven't faced them yet. Bodies can also be a problem. Bad rolls on CCP can screw up a lot of things.
Still, the list is very strong, but I won't call it broken. IMO, it is perfect for team tournaments, where it can both wreck some armies and hold very good against most of other armies.