Is my tile guy taking more time than necessary?

We are remodeling a bathroom. The tile guy (found by our contractor) seems to be taking longer than necessary and is paid by the hour. (I know, stupid). The area to be tiled is a shower, total of 130 sq feet for the walls. The tile is Glazed porcelain, using 12 x 12 pieces, staggered look, so their are two 6 inch end pieces on every other row. There is a 2in border through the middle, using mosaic tile. Six round cuts had to be made for jets and faucets. He has worked four 8 hour days and still isnt finished placing the tile, no grout work done yet. Does that sound like he is taking too long? The work looks great so far, but we are afraid he is taking advantage of us. He still has to do the shower floor then the bathroom floor, but if he is stretching this job out, we will just find someone else to finish it. When I say 4 days, I mean 4 days of just tile, time for teardown and placing backerboard is not included in this 4 days. He took forever for that part too though!!