Frustration at the lack of delivery a product does lead to speculation, doesn't it. Why is Assaf maintaining a presence at Interbike in late 2015? One possibility is to use the event to meet with potential investors. They have a manufacturing facility (looks like in an industrial park somewhere) but they may lack the ramp up capital (component purchases in bulk, initial payroll while sales build, marketing campaign). The most recent Superpedestrian blog states production is held up due to a need to resource some of their suppliers due to inferior quality. That may be true...but if it was the principal reason, they would have a sense for when new component shipments would be received and could forecast a shipping begin-date for their pre-orders.
Starting a new business from scratch, in a competitive U.S. market with relatively low volumes and lean net revenues, is a very tough challenge. I've seen this basic dynamic before - great concept, introductory product, lack of transparency and constantly moving delivery targets - and the end result is not often very positive. If only....
Jack