It has been speeded up, and there is mention of this in the 'What's New'.

It still however downloads data appr.2x+ slower than how MC/SC do it. But now it is bearable.

One more thing that people might not recognize initially is that by default and by design Zorro does not capture all the ticks streamed by the datasource
(it does not 'subscribe' to data, but 'requests data updates' at specified intervals).

This can be regulated by TickTime, but the consequence of this is that range of bars in RT will be smaller/close of bars will be different from historical bars, and therefore there might be differences between signals/trades in RT and those obtained after downloading historical data and retesting (for verification).