The AI Execution Gap: 35% of Firm Professionals Say Strategy Doesn't Match Day-to-Day Practice

Thomson Reuters Institute's August 13 analysis of its 2026 Future of Professionals Legal survey (736 professionals, 46 countries) identified the central law firm AI challenge for the second half of 2026 as execution, not strategy. Firms with a defined AI strategy are twice as likely to see AI-driven revenue growth — but 35% of professionals say their firm's AI strategy does not match day-to-day practice, and only 29% of those at firms without a strategy report AI satisfaction. The execution gap manifests in three concrete risks: shadow AI (34% of professionals use unsanctioned AI tools; 41% at firms perceived as moving too slowly), client relationship pressure (32% of corporate clients say they will reconsider firm relationships within 12 months if AI-enabled value is not demonstrated), and mid-career talent flight (24% of professionals experiencing an AI value gap are considering leaving within two years, at an average replacement cost of $232,000). Only 15% of firms are currently measuring AI ROI — making it structurally impossible for most firms to respond credibly when clients ask for performance evidence.