ANY skater from ANY federation is capable of generating a huge score when she skates cleanly. I think Jenni Vahaama is a talented and very promising skater, and I expect her to do well at the JGPF. But I don't think she is more consistently clean than any other skater. She had a clean FS at Finlandia, but not at Nationals, and not at her two JGP events.
I don't think ANY of the current top ladies, including Ando, Kim, Mao Asada, Meissner, Kostner and Nakano, consistently skate clean. But each one has had one or more events where all the pieces fell in place---Ando at Skate America 2006 and the SP at Worlds 2007, Kim at the GPF 2006, Asada in the Worlds 2007 FS, NHK 2006 and the GPF 2005, Meissner at Worlds 2006 and 4CC 2007, Kostner at Worlds 2004, and Nakano at the GPF 2005.