No. 1 MB downloads in seconds on most connections; slow connections will be closer to half a minute than to 'seconds'.
This is why the Facebook app is so bloated in the first place, assumptions about connections and devices in the majority of the world.
Still. The point is that this does not take several minutes to download, and thus is unlikely to fail. And that's a huge achievment on Android. Applications that do very little can very easily get to 5 or 10MB. Facebook does quite a lot, and the benefits of doing that with only 1MB are obvious.
> Downloading a typical app with 20 MB APK can take more than 30 minutes on a 2G network
Then again overstating accomplishments is pretty standard for tech blog posts.