That'll be a time of day/load issue. You either get Belfast or Noida depending on who has the highest load. Mind you, the service operator is an Asian firm who tend to rotate their lead staff through their "overseas" centres anyway, so even if you get Belfast you've about a one in three chance of getting someone whose first language isn't English.
Mine's not that bad. I was last plugged in sometime on Wednesday afternoon, the 30% warning happened at some stage last night while I was sleeping.
Couple of calls, a few texts, some brief web browsing and an hour or so of reading e-books during that time.