I've finally managed to get 1 unit of 16gb for myself and another unit of 32gb for my fiancee from KLCC MC on last saturday.
This is my personal experience on getting iphone without waiting long. On last friday, I went to MC after work, and queued up at the Iphone counter. It only had 2 people ahead of me. At that time, I'd already expect that no stock is available, and this was exactly what I overheard when the staff told that 2 ppl ahead of me. So, when it was my turn, same story went for me. Then I asked the staff if I could pre-book the phones and collect it on the next day morning, and I was holding the Iphone checklist with me. Once she saw the checklist on my hand, she said OK! She then helped me filling out the form and verifying my existing contract details. Once verified, she told me to come on the next day morning, and went for her directly or get a queue ticket to collect the phones directly.
On the next day morning, as what I've been told, I reached there at 9am then got a queue ticket with just 1 person ahead of me. Everything was so smooth and fast, I got my phones within 1/2 hour then walked out from MC after that.
When I reached there, the queue in Iphone counter was like more than 40 ppl, and all I heard was "out of stock, and please come back the next day morning". When I was collecting the phone, I overheard a guy next to my counter, he actually arrived MC at 4am, and during that time, there was already 2 ppl queuing up ahead of him. OMG!! this was unbelievable.
Luckily, with my way, I wasted no more than 1 hour within 2 days to get 2 units of iphones. Perhaps, anyone who intends to buy can follow my way. I hope this info is beneficial to everyone here.