Yes, they were hacked attacked. Luckily, Twitter and Facebook had recovered. Google websites were also targeted but Google managed to deflect these attacks. This happened on Thursday and all of them have recovered.
So, if you are one of the many people who are complaining about the slow response or time out on these social networks, you should know the reason. 
According to Straits Times report, no data were compromised during the attacks. Some describe it as DDOS (Distributed Denial of Service) while others describe it as DOS. Anyway, they are similar. When executed, they will slow down servers and users may experience time-out on most occasions.
Such massive onslaught of demand can overwhelm website servers, slowing service or knocking it offline. ‘Ten years ago we saw the first DDoS attacks take down some of the world’s largest websites,’ said Cisco chief security researcher Patrick Peterson.
Click Here to Read the Full Report
(source)
August 7th, 2009 at 11:08 am
Wah piang. Denial of Service is an attack, not hacking.
August 7th, 2009 at 11:09 am
hahaa.. true.. my fault.. will change..
August 7th, 2009 at 11:12 am
Already updated. You should also mentioned it to Straits Times la..