at this point, the good news is that this is not a disaster
maybe 1000 grafts was too conservative to give the density you wanted in the area transplanted
might be the reason for you disappointment;
(do you know/can you find out the recipient area in cm2?)
for instance, a recipient area greater than 16cm2 for the 1000 grafts you received (given the density of the hair sitting directly behind the proposed new hair line) will give a density of less than 60 grafts per cm2.
in the temple angles this will probably look like thinning (as it does)
maybe the FUE procedure, which, in general, is known to give lesser yield than FUT, reduced that 1000 grafts to 900 (they say the yield is 10% less with FUE)
if that is the case and everyone of those 900 grafts grew out,
your recipient area would need to be 15cm2 or lower to reach a density of at least 60 grafts per cm2
find out these numbers
they will relieve your "waiting" for growth when all might have grown already
look, numbers mean nothing if you are satisfied
but if you are questioning whether the procedure failed to grow fully or if it was just a case of not placing enough grafts to satisfy the density you expected,
these numbers (recipient area in cm2 and number of grafts transplanted) will clear this up
what ever the case, this is an easy case to BEEF up the density
with another procedure (i know you've heard this before but at this stage, this is a good plan that you can be proactive about now by consulting with other docs or planning with your current one)
best