M8 M73 M74 Motorway Improvements Project: EIR release

On 14 February 2017 Keith Brown then Cabinet Secretary for Economy, Jobs and Fair Work said of the work on the M8 “Road users can expect to shave approximately 20 minutes of their journeys along the A8/M8 corridor between Glasgow and Edinburgh and approximately”

https://www.transport.gov.scot/news/cabinet-secretary-announces-new-raith-junction-to-open/

Has this objective been met, and if so, specifically how has that been measured and verified?