The exploit to get the minute instantly seems to work sometimes...but other times it doesn't...
and it doesn't work as flawlessly as the OP says...you can't simply drink 4 ales then map travel every 40-55 seconds to get the instant minute...you have to drink something to keep the drunkeness going...
if the OP could provide a better guide on how to do it I might be inclined to confirm this for premium.
better guide meaning step by step....include when to drink and how many, when minutes should be awarded, when to map travel.
I believe the original bug has been fixed by anet...but I think there might still be a way to increase the speed in which you get the minutes.
and here's a thread on guru that seems to confirm the bug fix:
http://www.guildwarsguru.com/forum/show ... t=10060757