Reading data from Excel in Toad Workbook v6.0 was painfully slow. I don't know what changed, but now in v6.2 it is lightning fast.
As an example - using the same Workbook on an Excel file with 2800 records (only 5 columns).
Load time in ver 6.0: 49 secs
Load time in ver 6.2: <1 sec
Just posting this here for others that may have same problem to know its been corrected.