Can we put this issue to bed with actual data?
The general opinion is that when it comes to speed, DAS Trader Pro bests IB TWS (besides other usability issues) . Has anyone ever tested this to any level?
What you need to know is that DAS with IB uses the same order pipeline as IB TWS, or so I am told by the DAS support. So speed gains, I speculate, would come from faster market data in DAS. In other words, you would see the price faster in DAS. But a real life test of IB TWS vs another platform (I dont have DAS) showed definitely an estimated 0.25 s lag of prices updating but I am not sure if that is enough for a competitive advantage/ make any difference in manual trading.