Frankly, I don't think 5 stores per week in from one to three markets would make much of a difference in "cannabilazation" of sales. Especially given 1200+ stores nationwide. Certainly not from 4/5 to 7%.
I'd guess the increase is partly due to the difference in prices (they were raised twice during the past 12 months). Overall, though, 34% revs increase is an improvement over the past couple of 4-week periods which showed approx 32%.