Boise's Capital City Development Corporation (CCDC) worked with walkability expert Jeff Speck to create a walkability study and report for Boise's amazing downtown. The following is a direct quote from the study:
"Downtown Boise benefits from a quite small block size—about 300 feet square—and almost none of these blocks have been consolidated into superblocks, which tend to decrease walkability by focusing traffic on fewer streets, causing them to become too wide. The logic of small blocks suggests that no further block consolidations should be allowed, such as the one currently considered at St. Luke’s, which will significantly undermine the effectiveness of the street grid in that location." (emphasis KBC)
See the whole study here.