Your assertion below has no basis.
If Singaporeans are supporting WP MORE than other opposition parties, why are there instances whereby other opposition parties' votes having higher than WP's wards?
You are claiming in general, WP is far superior than other opposition parties but this is not conclusive because Yishun, MK, Pungol East, Sengkang West etc are getting less percentage votes than some other opposition parties' wards like Marine Parade (NSP), Tampines (NSP), Potong Pasir(SPP), Bishan Toa Payoh (SPP).
Statistically speaking, you can only claim that WP has absolute credibility over SDP and RP but not NSP or SPP.
Goh Meng Seng