I disagree. The US Supreme Court has ruled that no state can sentence a teen to LWOP without consideration, but they certainly can sentence them to life with the possibility of parole. And they can also continually deny them parole. Here are some recent Texas cases involving juveniles that I think amount to more than a mere slap on the wrist:
17 year old guilty of attempted murder = 15 years.
http://www.chron.com/crime/article/Texas-teen-who-called-murder-absolutely-10876709.php
17 year old sentenced to life in prison for murdering a 6 year old.
http://www.nydailynews.com/news/cri...-rape-death-6-year-old-girl-article-1.1929256
16 year old sentenced to 30 years for bludgeoning death.
http://www.star-telegram.com/news/local/community/fort-worth/article52292550.html
15 year old who murdered a 2 month old baby her mom was trying to adopt = 40 years.
https://www.dallasnews.com/news/crime/2015/05/22/teen-sentenced-to-40-years-for-babys-murder
16 year olds who murdered a classmate sentenced to 30 years.
https://www.dallasnews.com/news/cri...-years-for-murder-of-of-17-year-old-classmate
Ultimately, I think it depends on a few factors like the heinousness of the crime, whether it was planned, the sophistication of the perp and who the victim was (longer sentences for younger victims, shorter for older victims who may have been parents or guardians who abused the perp, for example).