Here are some excerpts from the post "New GM/GS Soundbank" http://www.synthzone.com/ubbs/Forum37/HTML/014383.html
That is mentioned at the top of this page:

Mediastation Weaknesses:

Now before you guys begin to think that I am either on the Lionstracs payroll, I wish, or just some idiot who thinks his keyboard is perfect and has no faults; let me tell you what in my opinion are the weaknesses of the Mediastation. First and foremost it is the styles. If you think that a brand new company like Lionstracs is going to start out with a library of styles that surpass companies that have been extensively developing styles for 20+ years; like Yamaha, Korg, and Roland; then you do not have very realistic expectations. As for as the question, ”did Domenik ever get someone to develop styles for him?” The answer is yes. When I first purchased my Mediastation, about 6 months ago it already had a small number of styles included. I decided that I would rather base my purchase on the quality and the features of the hardware installed and the open ended upgrade path that would provide me with the most current abilities well into the future than purely on the number of styles available. I was rewarded with in a few short weeks with the first organized library of 270 styles that I was able to download from the Lionstracs site.

Domenik does have people that he pays to develop styles but he has stopped adding styles to the current library as he is now designing the next phase of Mediastation development and it will be another first for arranger keyboards! Are you ready this? The first ever software driven arranger, incorporating audio and midi and………

Based solely on Giga sounds and Virtual Instruments (VSTi’s). If you know the quality of VSTi’s and Giga sounds then you realize how big a leap forward in technology and sound quality this will be! Not only incorporating the occasional Giga sound into a style, but also building the styles from the ground up using all Giga sounds for all style accompaniment parts and then throw in the VSTi’s for good measure. So all mediastation owners will also receive Gigs upon Gigs of fantastic sounds!

This new all Giga and VSTi Style Library is based on the technology of LS 4.0 a new version of Linux Sampler that Domenik is helping the open source community by funding. It is slated for release in the first part of December, so I do not anticipate the G.V.S. Library until early next year.