Unless Romney outsources his phone bank to India (or there's a call center hidden from the sidewalk), the total number of supporters could not have been more than 25. Compare that to McCain's bustling Manchester hive, where 50 supporters pound every phone line.
McCain has been leading Romney the last two weeks in the Real Clear Politics average. However, he hasn't added to what is a 4-6 point lead. Romney could be closing the gap with the immigration issue. We'll know tomorrow.