Its my experience that somehow Singapore is the World's most expensive place to buy Canon photo equipment. E.g. When I was in Sydney last year in Oct 2-3 weeks after the launch of the 5D, I walked into a shop that had a 5D for sale. The price after GST refund was about S$5,700. My friend had bought one 1 week earlier from CP and he proudly paid $6,688. Another example is also last year I walked into the big official Canon showroom in KLCC, in KL, and bought a BG E2 for S$220 (after bargaining).
I can give you many examples that its cheaper to buy Canon in USA, HK, etc from shops like B & H, etc. but you know it. On the other hand, when I was asked to inquire about prices for Nikon produsts in Australia, I found that S'pore is cheaper than them.
Hence I conclude its only Canon products that are ex here in SG

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