From the linked photos, there appears to be a non-certified Blue Mountain EFIS/ONE in the panel mock-up, but the installed panel shows an equally non-certified Dynon EFIS-D10 and a Garmin GPSMAP196.  Neither the Garmin or Dynon electronic displays are recommended for IFR flight or even as primary instruments in VFR (without back-up -Dynon).  There is no AI backup. I don't see a wet compass at all.  Also out of the normal scan range is what appears to be an altimeter and airspeed indicator on the passenger side.  IMHO, this panel was seriously deficient. 

Rich,

 

As I look at the installed panel pix, I also see a Garmin 430 in the radio stack and the fanciest Tru-Trak (independent electronic gyros) autopilot that could be used as a backup in case the AI went out.  This assumes all was wired correctly and tested.  Other replies indicate the plane was lost in a thunderstorm - If that's the case it may not have mattered what was in the panel.  I think I will wait for the NTSB report.

 

PS: The new Garmin handheld has terrain warnings and vertical guidance - I am still waiting for that availability in my 430....