Nikon's D300s? Low light?

I read someone said it didn't do good in low light.
Shouldn't this just be lenses causing issue? Or does it not really like it.
I would be using it for wedding photography/couples outdoor and indoor (obviously) and babies in studio.

thanks. I'm just a little confused as this will be a BIG jump in camera for me.

Added (1). ALSO IF YOU HAVE ANYTHING GOOD OR BAD TO SAY ABOUT IT. WOULD PREFER SEMI-PRO, PRO OPINIONS Thanks!

Use a decent flash, and have decent studio lighting, and you shouldn't have any problem.

Sadly the nikon range is as blind as a bat at night. I do weddings, and without the flash assist, i got off five shots of the chinese ballons before the D70 got a lock… (i use olympus)

you can of course focus manually, or do whatthe rest f us do, preload the shutter, half depress the button, then reframe /recompose and fire… That reduces shutter lag… But auto won't work… It won't work in smoky barbeques or bonfire celebrations… Focus manually and set a greater DOF…

I have the D300, and it does pretty good, the D300s does better.

If you really want high ISO and clear shots, you need to step up to a D3s. With a flash, almost any camera will do Ok. The D3s is full frame, and the newest sensor.

The D300s does OK in low light, but the D3s will do way better, because of larger sensor.

I use a D300 and found it a major step above my older D70 and D200. The D300s should even be better.

Here's some wedding photos I found that were taken with a Nikon D300s.

And some night photos take with a D300s.

And some babies, as captured by a D300s.

Remember, the best results under low-light is only partly the product of the camera. You also need lenses with wider apertures (1.4, 1.8, 2.8, etc) to help capture images without the adding flash or other light.