A lot, IMO, depends on the implementation. I have used speakers with ribbon tweeters and currently use speakers with electrostatic tweeters and feel that ribbons and electrostats typically have very clean treble, which makes them less prone to exaggerate sibilance. However, I would imagine a well engineered dome tweeter in a well engineered speaker also could be good.
To my mind, the frequent causes of sibilance are frequency anomalies from 8 kHz to 10 kHz. They may be caused by microphones that have peaky response or speakers that likewise have peaky response. (Many audiophile speakers have peaks around 10 kHz.) Also, any part of the reproduction chain that adds distortion to high frequencies will likewise cause sound that is similar or identical to sibilance. Finally, poor room acoustics if untreated will compound the problem.