'The mind sees what it wants to see.' What a contestshipper will see as a clear hint, an advanceshipper will see nothing special. Same thing the other way round.
The point is that there will be no end to this arguement/discussion/debate until May clearly says who she likes more.
Yeah, now we are truly discussing something real. The fact is that, we may know hints about who May likes, but just when she clearly say who she loves we will know the truth. If you have seen the anime Card Captor Sakura, you would know that the hints may lore the people.(if you have seen the anime to the end). That's why I have hope that maybe May could discover love fellings for Ash.