Okay, not all gateways. But top by volume, yes. Not by the people running them, but at the network/ISP layer. There was some open source reporting about it in Singapore (not a democracy admittedly) I'll try to dig up. But on the 5th anniversary of the Snowden leaks, why do you find it strange?
OK, maybe at network/ISP level. There's no way for relay operators to know, of course. But if an operator learned of logging, I'd expect to see that reported on tor-relays@lists.torproject.org, and I don't recall that.
This is yet another reason to hit Tor through a VPN service. Or better, a nested chain of VPN services.
Edit: I do recall a post by Virgil Griffith about the situation in Singapore.[0] He says nothing explicitly about logging, but does note that Singapore's "love of anti-corruption exceeds its apprehension about human-rights-laden privacy enhancing technologies." And I don't find anything about logging of Tor relays there. But then, I'm searching in English :(
