helpless,
i had my interview in mar'10 and file sent to london in nov'10. the status update of aor came in nov'10 and processing started in apr'12.
got medical request in may'12 and done in the same month. further medicals for 1 fam member were requested in jul'12 and oct'12 (sent them out w/in 2 weeks of request in both cases). had a new born in jun'12 whose meds were requested and done in end sep'12.
last update on the site showing medical results received was put up in end nov'12 and waiting for the next stage since then, which some lawyers suggest can take b/w 6-10 weeks.
though have also heard that process becomes quite quick once the 1st stage is successfully completed. do revert w/ your timeline and pass on any information you may heard that might be useful.