I just opened the site in chrome and did a hard refresh on the Good 2G setting of the chrome tools, only took 3 seconds. Maybe you're cell phone dropped the connection or something.
In contrast, HN loads in half a second on that connection.
Obvious result: AMP is bloated.
That being said, I just received 239 ms with Pingdom.[1]
The majority of time spent will be on getting the 170kiB AMP lib.