WA SMP is not coming faster than other states. Because there quota is higher than other states and They have approved most sponsorship as compared to other states.
So DIMA will publish SMP for all less Quota states and then WA so its easy for them to manage. As they have been doing VIC, ACT, NT & Now QLD.
God knows how much time will applicants get for processing when they will publish WA SMP because May 2010 is not so far.