hahahaha I hear you there...
I have always had a HIGH receding hair line. I use to get teased in high school how I was going to be bald by the time I was 20. Luckily it was/is a SLOW process for me. My 10yr reunion almost 1/2 the guys where 1/2 bald and my hairline had not moved except the back of my hair was 1ft longer. LOL 80 rocker... I got to give shit to all the guys who said I was going to be bald. Karma.
My 20th reunion mine had still not changed noticeably but 3/4 of the guys where 100% bald....
I have my 30th next June. OK it's noticeable now.

It's not quite where it's wispy on top but it's defiantly thin and had receded. NO crowning so thats good.
I have not noticed being on test the last 3 years making any significant change. Not any faster or slower. I have like many gained more hair everywhere else.... I never had any hair on my back. Now I have a few long strands on the top of my shoulders and shoulder blades area and some at the very bottom of the back. All the hair on my arms has gotten thicker and a little longer. Im not a fuzzy bear by any means thank god..... I do use a trimmer and trim everything once every month or two just so it doesnt get out of hand.
If they dont hurry up with the hair cloning I will probably be forced to shave in the next few years...
In other words, it all depends on your genetics. If you are prone to hair loss it may speed it up some. If you are not then you will probably have little or no thinning.