Slow start to a musical adventure is challenge at Grant Park concert, then the good times roll

Review: The Grant Park Music Festival likes to break from the routine in programming and presentation. Sometimes it does so in dramatic ways, and sometimes the departures are more subtle, as they were during a concert June 29 in Millennium Park’s sprawling Pritzker Pavilion. This evening began at a crawl — until Finnish pianist Juho Pohjonen brought vitality, and elegance, to a Chopin piano concerto.