45 mins from the Springs to AUH airport is about right - providing there are no accidents, bad weather, etc. The main road from Dubai to Abu Dhabi is for the most part the only road. Bit like the M25 - it's either scarily fast or a car park.
I commuted on it for 2 years and I don't recommend it as the best way to start or end your working day. But plenty people do. Cannot comment on whether EY would be happy with this or not.