For years, slowly-burning spiral coils of incense were among those sights -- and smells -- that, through tourist brochures, I got to associating with traditional Hong Kong. But a friend from a Cantonese-majority part of Malaysia told me that spiral -- as opposed to, say, the Hokkiens' straight sticks of incense -- are to be found in Chinese Taoist temples wherever the worshippers' are Cantonese.
And I did indeed encounter such sights on visits to another Cantonese-majority territory in the form of neighboring Macau. (As an example, this Photo Hunt's second photo was taken at the Lin Fung Temple in Macau.)
At the same time, spiral coils of incense can seem particular beloved in Hong Kong. Or maybe their high density inside of such as the Man Mo Temple on Hollywood Road may just be symptomatic of Hong Kongers' tendency -- propensity even? -- for high density everything (rather than just housing)! ;b