If the bike ran great no, wouldn’t indicate a problem…however if you hadn’t already I would check the gap of the plugs and compare to what your bike requires. 2 miles could indicate a slow shifting condition on your part to get up to speed in that time.
There’s alot of factors that could come into play, hill, load on the bike such as laden saddle bags etc. Even though you have a tach I would probly say keep using your hearing to judge shift points. Tachs are funny things, especially aftermarket.
I would say try it again…ofcourse at a less congested time and see what changes you can physically make to see if theres a difference. If none can be noticed then might want to take it to a professional mechanic to give it a good check up.