The proof  is in the picture!  Europe's carcass grading system of "E" being the most desirable to "P" the least, can be achieved using a Texel ram as a Terminal Sire. 
Texel's productivity, efficient conversion of roughage, and speedy lean muscle growth rate are attributed to a unique gene known only to the Texel breed as the myostatin gene, thus greatly adding to their value. The ewes are hardy outdoors and make excellent mothers. Rams making excellent terminal sires because they are lean, yet heavily muscled, passing the effects of the myostatin gene onto their offspring. Together, they produce a faster growing lamb ready for market sooner, increasing profits.  Resulting in a high quality, desirable, low muscle fat, tender and mild flavored table meat.  Their white wool can be variable, dense, medium, lofty and takes dye easily and used in various applications.  Some selective breeding is showing to have a bit of natural shedding qualities.