As said:
Cat 5 = slowest noob competitor
Cat 1 = Elite semipro
Thus, Cat 6 below noob competitors.
And I, and many others here could definitely outclimb you on a mountain bike with knobby wheels, with only 400 total feet of elevation change on the course. Give me a road bike, and it won't even be close.
And to top it off - I can barely keep up with a Cat3, and am probably more in Cat4-5 range for racing.
True racers don't even waste time with this kind of commute-competition stuff - they save their effort and mental focus for real racing.
Just feeding the troll..