The verdict is out.

GDP for 2008
Singapore 1.1%
US 1.1%
Malaysia 4.6%
Thailand 2.6%

ASEAN 2008 Population 570 million
ASEAN Total trade USD 1.6 trillion with 25% intra ASEAN trade
In 2007 FDI into ASEAN USD 63.3 b (15% FDI from ASEAN)
Towards AEC by 2015