The article says that TAG hasn't increased their sales volume, that it's basically flat. The added revenue growth has come from the increase in prices. Seems like a short term tactic, rather than a winning long term strategy to me.
However, the article also mentions that TAG has drastically reduced their point of sales, while increasing their own mono-brand boutiques. I think this strategy is working to some extent. The boutiques can greatly improve the customer experience. I've personally experienced this and it does make one feel more inclined to pay full retail at a boutique when given the VIP treatment. OTOH, I miss the days of an easy "Friends & Family" discount from Macy's, as this is the kind of AD that TAG seems to be getting rid of. Fewer discounts, greater profits.