Supposedly, 2015 has been a busy year for Enya. However, we do not have any detailed information on what Enya is doing these days.
The National Electrical Contractors Association (NECA) recently published NECA-BICSI-607-2011, Standard for Telecommunications Bonding and Grounding Planning and Installation Methods for Commercial Buildings (ANSI). The new standard was jointly developed between NECA and Building Industry Consulting Service International (BICSI).
Due to the way bonding works, there is an overhead of about 10% (according to Fusion Broadband), so the resultant throughputs are about 90% of the total throughputs of the individual ADSL or ADSL2+ connections used.