Hairline recession may stabilize sometime, but this do not imply that other effects - like overall or localized density loss- wont take place. Hairline recession may even start again after stabilization. To answer your question one must make a life-long follow-up of several balding subjects pertaining to several patterns within the gradient of ways one can bald.
How quick is yours receding? Mine is pretty slow. Mine is only the very front of my fore lock. Its actually still the same spot as my original hairline just much thinner.