Does overexposing help get a better RAw file in the OMd?

KwikVik wrote:

I'll be getting my EPL5 soon, and was reading this article - http://diglloyd.com/blog/2012/20121114_2-MicroFourThirds-quality.html

I've generally noticed the OMd and e-pl5's (which uses the same sensor, imaging process etc.) shadows to be too dark. Most of the samples I see of these cameras in difficult lighting seem to have almost fully black shadows in certain areas.

What do the omd,epl5,epm2 owners here think ?

Anyways, to fix the shadow issue I was thinking I'll fix the problematic ones in Lightroom.

Meanwhile I read the article given in the link above and these lines caught my attention - "With conservative exposure, a JPEG avoids blowing out. But as the pair of images below shows, the best exposure for RAW will badly blow-out the JPEG"

Has anyone here been experiencing this ? Does this mean that its generally better to add a positive exposure compensation as a practice to what the camera is recommending, to be able to get better RAW files(with lower noise) to work with ?