that's always a hard question to answer. I would only say that even if there's a preference to stay at Stanford, there should be at least a few who go to top institutions elsewhere (see match lists of top IM programs like Columbia, Hopkins, UCSH, Brigham, MGH, Penn).
p diddy
This is ridiculous. Compare Stanford to a place which would have similar West Coast/California preferences, UCSF (pulled directly from their websites, since 2011):
UCSF Cardiology: CPMC, Case Western, Cedars Sinai, Duke, Emory, MGH, Michigan, Northwestern, Stanford, UC Davis, UCSF, UTSW, WashU
Stanford Cardiology: BIDMC, B&W, CPMC, Cedars Sinai, Cleveland Clinic, Colorado, Columbia, Duke, Harbor UCLA, Hopkins, Minnesota, Northwestern, OHSU, Stanford, UC Davis, UC Irvine, UCLA, UCSD, UCSF, USC, WashU
UCSF Endocrinology: UCSF
Stanford Endocrinology: B&W, Stanford, UCSF, U Washington
UCSF Geriatrics: UCSF
Stanford Geriatrics: UCSF
UCSF GI: Columbia, Mt. Sinai, Penn, U Chicago, UCSD, UCSF
Stanford GI: Baylor, CPMC, GWU, MGH, Michigan, Penn, Stanford, Tufts, UC Davis, UCLA, UCSD, UCSF, U Washington, Vanderbilt
UCSF Hem/Onc: Dana Farber, Hopkins, MD Anderson, MSK, Stanford, UCSF, U Washington, WashU
Stanford Hem/Onc: City of Hope, Columbia, Fox Chase, Stanford, Temple, Tufts, UCLA, UCSD, UCSF, U Washington
UCSF ID: B&W/MGH, Hopkins, UCLA, UCSF, U Washington, Virginia
Stanford ID: B&W/MGH, Harbor UCLA, Stanford, UCSF, U Washington, Yale
UCSF Nephrology: B&W, UCSF, U Washington
Stanford Nephrology: Stanford
UCSF Palliative Care: MGH, UCSF
Stanford Palliative Care: Stanford
UCSF Pulmonary & Critical Care: Baylor, Colorado, Duke, Stanford, UCSF
Stanford Pulmonary & Critical Care: Penn, Stanford, UCSF, U Washington
UCSF Rheumatology: UCSF
Stanford Rheumatology: B&W, Hopkins, Stanford, UCLA, UCSF