Great! Easy and very quick to evaluate the gaps. I really like the calculated time gap as you move the cursor over each driver.
I would suggest you display Time followed by Driver Name. Possibly add list of teams and highlight times/names when user selects a team (using color for this would be just too much.) Possibly display Time – Driver Name – Team Name, OR Time – Driver Numb/Driver FIA abbreviation – Team FIA abbreviation.
After re-reading the above, I would prefer the Last suggestion (Time – Driver Numb/Driver FIA abbreviation – Team FIA abbreviation.)
This could also be a great improvement to the qualy and final grid reports where I would use Vertical access for final grid position and Horizontal for actual best official lap time making loss of position time penalty very obvious, especially with all the expected PU change penalties.