Great climb. Followed the route you describe on the way up but dropped straight down to the trail below from the saddle of Grinnell. In early July there was a great snowfield ~1500 feet that really sped up the decent.
Solo trip, originating from Many Glacier Hotel. Slogged up to the west ridge from Swiftcurrent Glacier Basin, reached the summit in about 5 hours. Didn't spend much time on the summit, as a firm, cold wind was a-blowin'. Took about 9 hours round trip.