Figures shown on that link are at best misleading and at worst rubbish.
As a guideline a completed studio presently would cost around £95,000 and would rent for around £700/month.
In the near future there is going to be a major surplus of apartments in Dubai as many projects reach completion with an inevitable slide in rental and residual values.
There are less villas available and these may be marginally protected from a slump however many people presently living in villas are likely to move and take advantage of lowering prices of apartments. Many of the apartments will be great places to live such as the Marina when it emerges from being a building site.
Unlikely to be a property crash but expect some settling of values and returns over the next three years.