I mean it is in focus the instant you depress the shutter or touch a focus point on the touch screen!

that's a 10x slower shutter speed than the 1/focal length

Given its slow f/4 maximum aperture at the wide end and slower f/5.6 racked out, the ability to use some slow shutter speeds and still get sharp images in low light is a blessing

The images speak for themselves, but I'd say the combination of fast shutter speed and OIS dealt with my so-so camera handling technique admirably.

That said, it's light enough that you absolutely can handhold and shoot even at relatively slow shutter speeds

For slower shutter speeds and low light, will need a mono or tripod

I always turn off the IS in the body and use the lens, getting back even 2 additional stops with the slower shutter speed