The hybrid bit just means that they have ceramic balls and steel cases which all the ceramic bearings I have seen have.
I have just used Campagnolo Cult (expensive) and regular (stock on Chorus type gear) ceramic Ultra Torque bearings which have to take a lot of punishment and haven't experienced any additional problems compared to the cheap steel UT bearings.
I suspect the majority of ceramic bearing would be fine but :
a) problems may be specific to design and only relate to a particular make.
b) Some ceramic bearings are designed to run without grease such as the Campagnolo Cult bearings. These spin forever when flicked and it may be that some normal bearings have minimal grease inserted to sell them - these would wear out quickly.
Ref point b ...are you saying some have grease inserted simply to appease ill informed consumer expectations ? I have no experience of ceramics but would be interested to know.
Under normal circumstances, grease extends bearing life...but the downside is friction. Rather than more grease in a bearing, you want less, as less will increase efficiency...but decrease life.
This can be overcome by a little thing called maintenance. Run with less grease, but increase the maintenance, eg strip and grease more frequently to maintain efficiency AND life of the bearing.
As an example, I fitted low friction bearings to one of myBBs. Without a chain on, they spun fantastically, just on and on. As soon as I fitted the outer seals of the BB (not the bearing seals) and smeared some extra grease between the two to prevent water ingress, all the lovely spinning effect was lost. Friction. Same if you overpack your bearings.
In the end, I removed the grease between the bearings and BB seals and opted for more frequent inspections.
