It's not the same as the Johnson grass I'm used to seeing. The roots aren't the same.
One of my houses has it though and it seems to die out as it gets hotter, so I'm wondering if it's not a strain of fescue. Last year it took off way ahead of the native grasses, but disappeared about June. This year seems the same.
My lawn looks exactly like your picture. I almost accused my lawn man of not cutting the lawn last year because it grew so fast. Two or three days after a cutting, it was four inches high. Looked terrible.
If you read the label on most seed sacks, hey contain a very high percentage of tall fescue. If you don't let it go to seed, it will stop growing once we stop having cool nights. 4951