30min for me on brands hatch with the 97t(dfgt) mostly it was a bravery test as in "how much faster can i go around this corner?!" then doing the full track except the hairpin in 4-5gear and 1.06.8xx was there. never completed vettel challange more than silver, but got all gt5 missions except for nascar events. gt2-4 100% complete except the 24h events. last gt2 license test took me forever to understand the (in gt series overdone) compression grip effect.