So I ride a Sirrus and recently just posed a similar question. The overwhelming opinion on why/how road bikes are faster than hybrids is because of the inherent reduced wind resistance.

I did not and still do not want drop bars but just last week put on a set of carbon aero bars I got on CL of $60 and am very happy with the result! I'll try to post pics this week and also some real time/speed comparisons when I get some laps done on my common routes but I'll say this, even my indoor trainer speeds have improved - didn't expect that!