Although I am not 100% sure and dare not claim strongly, I pretty much can say that more than 80% of Singapore Internet user uses IE, good for you, Microsoft.
There are also some in Singapore who is using FireFox, etc.
But, I think not much have heard of Opera, cliam to be the faster Browser on Earth.
Other that the High speed that it claim, 2 features that will certainly make me download and test it out:
1. Integrated Search
2. Opera is also the First Web browser to natively support Scalable Vector Graphics (SVG)
Internet is moving so fast, faster than I can say "lets Opera!"
Rel link to read: Opera Vs. IE Vs. Firefox - Browser Comparison