Attached is a photograph of a female Piping Plover, sitting over newly hatched young, at Sauble Beach in Bruce County, Ontario, from about 50m -- using an HS10 handheld at 720mm, cropped in-camera. IMO the results were marginally better than digiscoping with a Fuji F30 at 3x, and Zeiss 85 at 20x.
Nice tip about shooting at 3 fps in burst mode.
The EVF seems better at 60 fps.
Spot metering and focus/exposure lock are useful for photographing birds -- while manual focus, using the focus check feature, manual focus indicator, and AE/AF lock button is available for difficult focussing issues.
FWIW, the HS10 would have been useful on Pelee Island this spring, when an active female Blue Grosbeak evaded attempts to be digiscoped. It certainly weighs less than the Canon T90 (with its sadly obsolete lenses) that I used to haul around.
BTW, the HS10 has a silent mode, which shuts off all the sounds and lights (with the exception of flash in the scene position mode, using the natural light and flash setting), so that when you're trying to get a shot of a White-bellied Antpitta at 6:00 a.m. at San Isidro, Ecuador, you won't have a buzzing, clacking dSLR a couple of feet from a fellow birder's ear.
Mike