Spot on Hanrahan
An object floating in the current pattern you show would need to travel up to approx 7000km in about 16months (480days) to get from search area to Reunion - i.e. at a current speed averaging about 0.6km/hr or less than 1/3 knot.
Numbers are rough, but outcome is well within plausible range!
Let's let what the identification process yields.
