Question about limit_rate directive

Our organization is testing nginx,

We noticed that the limit_rate directive works for data sent out from
the
server very well (downloads),

But absolutely no limit seems to be set for the data sent into the
server
(uploads),

Is there any way to allow a limit_rate for uploads too? And if not,
would
this be considered a bug to be fixed?

We handle large uploads, and Upload Module seems perfect, but the
uploads go
at 100% full speed which we want too slow down.

Thanks.