Sideslip or crab immediately after takeoff on tow in crosswind?

On Monday, March 6, 2017 at 10:16:37 AM UTC-8, Dan Marotta wrote:
Crab to stay over the runway until you have enough altitude to clear
obstacles, e.g., wind sock should the tug drift downwind. The tug
should also crab so you'll both be flying clean, as Tom said. After
you've got sufficient altitude, say 50-100 feet, slide back behind the tug.

On 3/6/2017 11:05 AM, wrote:
On Monday, March 6, 2017 at 9:48:13 AM UTC-8, wrote:
However, doesn't crabbing the glider add a lot more drag to the towplane/glider combo?
No, a slip creates drag. A crab is clean.

--
Dan, 5J

This is likely just a consequence of poor flying technique but I seem unable to sustain a crab behind the tow plane without holding a fair amount of up-wind rudder. The pull of the tow plane seems to pull the glider's nose out of the crab otherwise.