Not necessarily. Perhaps in the southern cities. But a lot of the growth is people/companies fleeing other states to come here.
I grew up in Sherman and now live in McKinney. The northern burbs of Dallas have exploded with growth. Frisco used to be maybe 10,000 people at the most ... some neighborhoods had dirt roads. They're now at 121k.
McKinney was about 35,000 way back when. Now we're that plus 100k. Expected total growth will be pushing half a million once all areas of the city limits are populated.
There's no way those explosive numbers are from hispanic immigration.