I didn't ever notice the upshift light in my test drive or either of the two drives at the Ecoboost Challenge. It's more of a suggestion, but putting an upshift light in an ST does seem kinda pointless. I guess it's for if you want to drive for MPGs. Rather than downshifting, you can put your foot down and the turbo will take over. I found this out after downshifting to accelerate after a slow truck moved out of the fast lane. Rather than downshifting I should have left it in the gear it was in and just put my foot down because I hit a high RPM in no time and hod to upshift again.