The slow zones have been vanquished only in the downtown subway portion. Installation of the replacement railroad ties for the Kennedy Expy. portion has just started and will take most of the next year or so -- during which I'd expect lots more weekend closures, since it's a LOT of track. Glad to know that rush hour trains are back in business, though: my train ride from Wicker Park is back to 15 minutes, where it had been 30!