Texas has had an anomaly of so many suburban voters going for Republicans. Maybe the suburbs around Dallas, Houston, San Antonio, and Austin are newer and have infrastructure that doesn't yet have the high costs of maintenance and management that one associates with older suburbs of Boston, New York, Philadelphia, Chicago, and St. Louis.
See also Georgia and Arizona for a similar effect. Orange County in California fits the pattern.
Suburban voters going Republican is an anomaly? News to me. Republicans won the suburban vote in 2010, 2012 and 2014, you are aware, yes?