It has helped spinners more, especially to batsment pushing down the front pad. It has also hurt some fast bowlers when the umps see how many ball bounce over the stumps. Just my personal obsevations.
Hutton | Hobbs | Bradman | Richards | Tendulkar | Sobers | Gilchrist | Khan | Marshall | Warne | McGrath
Sutcliffe | Gavaskar | Headley | Chappell | Lara | Kallis | Miller | Knott | Ambrose | Lillee | Muralitharan
Greenidge | Morris | Ponting | Pollock | Hammond | Worrell | Ames | Hadlee | Holding | Trueman | O'Reilly
Richards | Simpson | Sangakkara | Weekes | Border | Walcott | Botham | Lindwall | Laker | Garner | Barnes