quick look at the source coding of the chat room;
jQuery.timeago.settings.strings = {
prefixAgo: null,
prefixFromNow: null,
suffixAgo: "ago",
suffixFromNow: "from now",
seconds: "seconds",
minute: "a minute",
minutes: "%d minutes",
hour: "an hour",
hours: "%d hours",
day: "a day",
days: "%d days",
month: "a month",
months: "%d months",
year: "a year",
years: "%d years",
It would never say a century,
Probably just 100 Years.
The longest it could go would be some random number thats really long which only PM knows :I
I believe the order that is posted in, is the order you should see the 'seconds ago' stuff in.