Honestly, wet lubricants aren't champions of wet weather performance either. Neither lubricant does all that well in wet conditions and needs to be refreshed after use. The difference is that dry lubricants don't float off the surface of the metal as easily as oil based lubricants do. As an added bonus, dry lubricants don't attract the grit that wet lubes do and work to keep it out of the chain.

I haven't used any other lubricant for (about) 20 years. In that time frame, I've toured throughout most of the US in every summer condition imaginable and not found dry lubricants to be all that bad even during downpours.

I've also commuted to work extensively over that same time period in every imaginable condition including snow, ice storms, thunderstorms and even a few inches of hail. The only problem I've encountered has been applying dry lubricant to a cold chain. It doesn't work all that well. Thankfully, I'm allowed to bring my bike into the building at work so I add lubricant there if needed.