My wife and I did try some of the slices of cakes sold at McCafe once, though. Absolutely no flavor. Not comparatively little flavor. Just none. Zilch. Zero. They (we tried slices of a couple of different types of cake) were even more tasteless than the "pineapple buns" sold in local bakeries.
We have Sbux a couple of times a week in the mornings and usually get something like lemon tarts at the same time. HK Sbux is now being run 100% by Maxims (who gave US Sbux the Maxims share of all of the Starbucks locations on the Mainland in exchange) and everything about HK Sbux, already mediocre, is slowly being degraded (the croque-monsieur is sold by the half-sandwich now, the ingredients of the wraps are getting stranger and stranger -- e.g. stuff like avocado + whole kernel corn + thick-sliced deli ham, etc.) until it's as crappified as any other international brand that enters HK.