Thanks, everyone, for your input. It sounds like it's pretty much what I thought: it's a nuisance one can choose to adapt to (or choose not to adapt); the amount of nuisance factor is a direct function of the severity and duration of the rain.

I just wanted to be sure I wasn't missing something obvious.

Mine's a 2-person version. Given that the rain I'm most likely to encounter would be prolonged rain, not driven by wind (or the wind is mostly broken by the heavily forested areas around here), I'd probably conclude that this is a fair-weather tent. The extra space will be great for those sunny one or two night trips I often take, but I think I'll take my 1-person tent, which has a more stormworthy entrance on longer or predictably wet trips.