In article ,
says...

On Mon, 30 Aug 2010 18:12:19 -0500, Jim wrote:

Heard that numerous times.
The manufacturers don't talk about it much though.
Here's a Merc/Rude/Yammie 250 test done in 2003.
They used "identical" factory new Stratos 201 Pro XL hulls.
http://www.bwbmag.com/output.cfm?id=943489
with just 3 hulls the weight variance was a bit over 5%.

I wonder how much environmental issues like humidity and air temp
during the layup/resin process add to this?

Be interesting to look into.

I guess this leads to the "specifications subject to change without
notice" verbiage we see all of the time?