It's impossibe to compare times, there are too many parameters which people are not disclosing.
The City Centre is a big place. Lusk to the IFSC, is a lot different from Lusk to Leeson Street.
Time of departure, time of the year, weather and route are the main factors.
Very few people are going to disclose a route which they take. I know the route I take from Balbriggan to Dublin 1 in winter is approx 15 minutes quicker at 7am than a route a collegue takes from and to the same area at the same time.
Turnapin Interchange on the M1 to IFSC September to April mon, tuesday and wednesday is around 35 mins, Thursday and Friday is around 25 mins. In wet weather add at least an extra 10 minutes.
Turnapin Interchange on the M1 to IFSC May to August is around 15 minutes.
The N1 from the Port Tunnel southbound to Colins Av hasn't been open in its new incarnation when the traffic has been heavy so it's hard to say what, if any, positive effect this will have on times.