Hi there. We also submitted our application on April the 30th. Just had a mail this morning to say a decision has been made but i'm waiting till we get the passport before we celebrate as they wont tell you if it's been approved or not, just it's been processed.
So i'd guess they are just into May. Why not email them and ask, their address is :ManilaVisaEnquiries@fco.gov.uk. Good news is that they seem to be speeding up, I recon are settlement visas were put back while they delt with students visas....I dont have figures on success rate but I've been reading the forum for a couple of months and all seem to have been approved, eventually. Also I've not heard of interviews being required, maybe they are too busy to bother, one bonus for all the waiting, 17 weeks, 5 days and 4 hours, not that we are counting or anything.....