mate you should be delighted, and at 6 months you are an early grower thats for sure..
since starting fin and min over a year ago, i have stopped shedding, after the HT i shed only briefly for a while then stopped.
but i just went thru my yearly winter (aussie winter that is) shed that i always experience, and it has just stopped as usual. I have to say though it had a reasonable effect on my density, i had read on these forums that after an HT seasonal shedding can look pretty dramatic given HT relies on the illusion of density and any amount of shedding can look very obvious..
but i am still miles from the NW5 that i was before the HT so still loving life