Agreed - will be watching the Sora price (vs Tiagra) with interest. Ideally I'd be cheap and just replace the old style Sora shifters on my partner's bike with the new ones, but I suspect the cable pull will be different meaning I can't, which makes a full upgrade to new Tiagra more appealing.
Late to the party but very excited about that Sora - that shape shifter much better for people with small hands.