Going southbound on the 404 in the morning from Steeles, it's better to actually take the 401 exit and just stay on the left to go to the DVP as there's a bottle neck south of shepherd to where all the cars merge.
Even if you have a passenger, the HOV lane ends up coming to a standstill most mornings, and taking this route saves you a minute or 5. google map link
Noticed how he said morning! in the afternoon this entire area is a parking lot!